![]() | This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
Archive 1 |
I don't understand the comments about yellow/orange stains: doesn't this acid actually burn skin and corrode it, rather than stain it??? This needs to be clarified, because as written, the article is self-contradicting. Nyh 09:02, 31 Mar 2004 (UTC)
How long does the staining last for? Should I be worried about anything more than cosmetics? 169.237.44.114 21:35, 21 February 2006 (UTC)
What is that "g" after the digit 9 in the molar mass 63.0129g g/mol? Was it a typing error? sentausa 18:02, 9 March 2006 (UTC)
I'm confused with the pKa of nitric.
And I can't find where there has the value -2.
Which one is true?
Is the relation of pKa to the actual Ka value goes like: pKa = -logKa ? Because I'm looking for an actual value of Ka not pKa. Therefore, I think that noting the Ka value of all chemicals in the article table is of some importance, no? 74.96.186.207 00:46, 21 January 2007 (UTC)
what is the formula for nitric acid in acid rain??? O~O —The preceding unsigned comment was added by 86.6.160.152 ( talk) 16:01, 19 February 2007 (UTC).
Hello, I really need an answer to this question for a big school project I am doing. Is nitric acid an ionic or covalent bond? Respond ASAP. Thanx! 67.184.234.126 22:14, 14 May 2007 (UTC)
How to make 99% concentrated Nitric acid? —The preceding unsigned comment was added by 61.5.138.29 ( talk) 12:09, 16 May 2007 (UTC).
One of nitric acid's uses is in acid rain?
==Uses== ... Nitric acid is a component of [[acid rain]]. ...
Surely nitric acid isn't used in acid rain, unless it's in an obscure weapon?-- Steven Weston 21:01, 9 May 2007 (UTC)
that'd be quite a weapon... just TRY and stop it... "its like trying to stop the seasons" ~ —Preceding unsigned comment added by 74.87.82.86 ( talk) 06:34, 6 February 2008 (UTC)
At what concentration does Nitric Acid cause skin to turn yellow?
The NFPA symbol (i think thats the right terminology) is wrong. Health is 4 and reactivity is 3.
The properties of HNO3 are still too vague. Should we add some reactions as illustration for each property?Abelin C A usesobad 14:00, 20 December 2006 (UTC)
The boiling point of pure nitric acid is listed as 83 degrees Celsius. Where was that found? I have plenty of books listing the boiling point as 86 degrees Celsius. —Preceding unsigned comment added by 146.151.43.102 ( talk) 19:53, 12 November 2007 (UTC)
Someone please reword "When boiling in light, even at room temperature..." : I have only a faint idea of wht was meant. 1. Boiling in light? Boiling exposed to light OR at room temperature? Vapors exposed to light? What? 2. Boiling at room temperature - what, reduced pressure? 3. DOES boiling have anything to do with the NOx formation (other than the temperature acceleration)? —Preceding unsigned comment added by 63.81.122.66 ( talk) 16:21, 16 October 2008 (UTC)
It's said in the first few lines of the article that Nitric acid is highly toxic. The acid is indeed very dangerous as a highly corrosive acid and a strong oxidizing agent, but I don't think it's toxic. The nitrate cation appears almost everywhere in the organic world, nitrate salts are used as fertilizers as well, it can't be toxic, at least not highly toxic. - Zhieaanm 12:31, 22 November 2008 (UTC)
Can i concentrate the Nitric acid like H2S04? If not then how can concentrate the Nitric Acid? —The preceding unsigned comment was added by 193.251.135.126 ( talk) 12:45, 28 January 2007 (UTC).
The paragraph on industrial production was cleaned up and citations added. The No Citations reference was removed. Question: Is it appropriate for me to remove this indication, or is there a more formal procedure to decide that citations are adequate? Norm Reitzel ( talk) 13:47, 19 January 2009 (UTC)
Wiki fails again. Birkeland-Eyde Process. http://www.backyardchem.com/nitric-acid.php —Preceding unsigned comment added by 69.152.173.159 ( talk) 07:35, 8 May 2009 (UTC)
Why is it important to state that he was Muslim instead of where he was from? Wouldn't Arab or Persian or Egyptian do? Does one call Archimedes a Pagan scientist, Einstein a Jewish scientist, Galileo a Christian scientist and Feynman an Atheist scientist? —Preceding unsigned comment added by 212.54.216.186 ( talk) 15:49, 28 March 2008 (UTC)
Hi guys, could you elaborate more on the first method of synthesis, where it says "by taking a **** on someones face"?
About the synthesis, it says to convert red to white by using reduced air pressure, giving the values of 27 KPa or 20 mmHg. These are diffrent values by a factor of ten; I'm going to assume it's the higher one (just my intuitive guess) and change it to 27Kpa and 200mmHg. I could be wrong though, does anyone know for sure?-- 2tothe4 01:29, 12 November 2005 (UTC)
Something else... the removal of the NO by reduced pressure makes sense, but wouldn't heating the acid have the same effect? Or would the HNO3 start to dissociate?-- 2tothe4 14:51, 12 November 2005 (UTC)
Doesnt sulfuric acid turn skin yellow as well?
And tantalum, niobium - this at least needs clarifying. An "highest distinction" is a peacock term, and unsuitable. 83.100.250.79 ( talk) 16:08, 7 September 2009 (UTC)
You can add information that Polish sciencist invented method to get nitrous from air :) —Preceding unsigned comment added by 79.186.145.167 ( talk) 20:44, 21 November 2007 (UTC)
Under the section on Culture, I think that the original Batman story of Two-face involved a lawyer who was splashed in the face with nitric acid. Unfortunately, I don't have a reference right now. BTW - the Ira Ramsen story of nitric acid is a personal favourite. Oliver —Preceding unsigned comment added by 207.210.34.14 ( talk) 13:15, 7 October 2009 (UTC)
The intro says "Colorless when pure, and a slight yellow when glacial..." what does "glacial" mean in this context? Maybe this could be explained under the "Grades" heading? —Preceding unsigned comment added by Philwkpd ( talk • contribs) 05:02, 25 August 2009 (UTC)
it means concentrated to the max posible —Preceding unsigned comment added by 129.96.152.50 ( talk) 06:09, 14 September 2009 (UTC)
glacial nitric acid doesn't exist, it is only a valid term for acetic acid, someones making things up
It does exist, I use it in my labs regularly. —Preceding unsigned comment added by 129.96.197.174 ( talk) 02:25, 9 October 2009 (UTC)
I removed the statement about nitric acid being used by the ancient Egyptians; it seems dubious and is not backed up by a given external source. Can anyone find a source for that statement? Algebra 00:37, 6 December 2006 (UTC)
I believe that was referring to the nitric acid battery like pottery that some archaeologists found, they were filled with nitric acid I believe and had something like an iron pipe inside of another pipe, dipped in nitric acid inside of a jar, and sealed with a tar or resin like substance. more research is necessary, but I do believe that it was mentioned on an episode of myth busters awhile back, turned out to be a legitimate source of electricity and could provide enough voltage to be felt through one's skin....
There is an edge-of-archeology belief (almost UFOparanoids)that the Babylonians, not Egyptians were able to electroplate using the easier to make Sulfuric acid w/lead plates. First mention I can remember off-hand is Electronics Illustrated article of 1960s.
COULD the Babylonians have stumbled on weak sulfuric, yeh, and they had lead and left some peculiar pottery. Batteries?? electroplating... long stretch.
Am currently searching for legit aqua fortis info pre-Pyrotechnia (15th C., CE by which time it was common and produced on industrial scale. Theophilius does not mention it, but supposedly half-mystic Ramon Lull (inventor of various mnemonic memory systems and methods of receiving advice from Christian angels) and an uncorrupted ms. of le Grand Albert work of Albertus Magnus)(my interpretation of peculiar identifications found in 1911 Britannica which seem VERY wrong (speaking of Albert 'the grand' and Albert 'the small' as HRE electors) is confusing people with books (see an accurate footnote in the prologue of Eco's Name of the Rose) Aqua Fortis is *not* identifiable in the Corning Glass ed. of the Mappa Clavicula, earliest known Euro mss. on practical metalwork.
WinstonSmith —Preceding
unsigned comment added by
74.108.139.186 (
talk)
21:40, 21 October 2009 (UTC)
"Nitric acid is also featured on the "Pern" books by Anne McCaffrey, where it is known as "agenothree" because of linguistic drift." Doesn't this sound like AgNO3 - silver nitrate? Nitric acid would be eitchenothree. The part cites the book directly which proves that it can be a mix up. -- 188.2.116.37 ( talk) 10:00, 7 December 2009 (UTC)
shouldnt it be 'due to its tendency to adsorb oxygen from the atmosphere.'? —Preceding unsigned comment added by 99.229.206.22 ( talk) 10:46, 27 November 2009 (UTC)
The sources listed do not support the article; no mention of nitric acid is made. New sources have to be identified to support this assertion, or the Ressam passage will be removed. Bobkeyes ( talk) 00:33, 13 April 2010 (UTC)
I notice an anonymous person has selected the non-UK spellings of both "sulfur" and "niter" - which is fine with me. However, I will point out that when "nitre" was being calcined with clay and green vitreol, it was being done in Europe, so the presumption is that the substance being used was in fact "nitre." Norm Reitzel ( talk) 22:34, 28 June 2010 (UTC)
A Google search (on 30-11-2010) with Oxoazinic acid only renders 247 results, most from http://www.molport.com or from obscure websites selling chemicals. A common characteristic is that all these sites use the Chemaxon program for automatically generating this name. This name is never used by chemists and very misleading for inexperienced readers. Such a name should be banned from the chembox for avoiding confusing Wikipedia audience and propagating bad nomenclature practices. Thanks, Shinkolobwe ( talk) 22:05, 30 November 2010 (UTC)
Main discussion at Wikipedia_talk:WikiProject_Chemicals#Controversial_use_of_the_term_.E2.80.98Oxoazinic_acid.E2.80.99_in_the_chembox_of_Nitric_acid.
I propose to totally omit the term ‘oxoazinic acid’ from the chembox of nitric acid because it seems mostly to be used by spammers or crasy websites supposed to sell chemicals and never by honorable chemical companies such as, e.g., Sigma Aldrich or Merck.
Before adding obscure, or worse, inexact, nomenclature terms to Wikipedia, it is necessary to pay attention to the impact it might have in the real world. Wikipedia is more and more renowned in the field of science and techniques and increasingly used by students or professionals in various fields. Often now, Wikipedia behaves like a resonance box or an amplification system and is also frequently wildly recopied by other websites for unknown purposes. According an inadequate importance to obscure terms such as 'oxoazinic acid' and worse, promoting them as “SystematicName” or “IUPACName” in chemboxes could encourage their use worldwide and in a few years, it could be extremely difficult, if not impossible, to get rid of an erroneous and embarrassing nomenclature. As for a viral infection, a bad habit should be immediately stopped in the egg and no chance left to an ugly contamination to propagate and to develop into a pandemia.
Today, I resumed again my search attempts to collect valuable information about the term 'oxoazinic acid'. Hereafter, the very disappointing results returned by three well established search engines:
- Google: only 245 results (most of them from http://www.molport.com or from spammers sites trying to sell chemicals !);
- Google Scholar: only 1 results !
- ScienceDirect: only 1 results: Article in Press, Corrected Proof, not yet published: [1]
“A new approach to predict the strength of high energy materials” Original Research Article. Journal of Hazardous Materials, In Press, Corrected Proof, Available online 2 November 2010. Mohammad Hossein Keshavarz, Mohammad Ghorbanifaraz, Hadi Rahimi, Mehdi Rahmani. Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr, P.O. Box 83145/115, Islamic Republic of Iran.
From the abstract of this paper, it is not possible to verify the claim proposed by the contributor Plasmic Physics because the term 'oxoazinic acid' does not appear in the abstract itself, nor in the title of the paper. The term 'oxoazinic acid' could be attributable to any of the functional groups associated to the compounds cited in the abstract: nitroaromatics, acyclic and cyclic nitramines, nitrate esters and nitroaliphatics.
Ordering the paper costs US $ 41.95 and could causes notable troubles to the person making the order because of the delicate character of the subject treated and the possible negative implications in the daily life. So, in the practice, the information about 'oxoazinic acid' presumably given in the paper cannot be easily verified and such a reference does not fulfill its basic objective, nor confirm anything.
Adding an isolated and obscure reference from a paper even not yet published does not constitute a proof or a valuable argument to demonstrate a doubtful terminology.
This is why, I would suggest to also remove this reference from the main page of nitric acid.
The website of http://www.molport.com also contains unreliable information on strange chemical compounds. One of my most surprising finding was the following one:
Oxoazinic acid plutonium: HNO3Pu
http://www.molport.com/buy-chemicals/moleculelink/about-this-molecule/6107333
Not only, this approximate term does not reflect the very complex chemistry of plutonium, a redox-sensitive radionuclides with multiple valences, but the molport company even proposes to sell it ! As plutonium is a strategic fissile material (and also a highly radiotoxic alpha emitter), its use is severely restricted to avoid the proliferation of nuclear weapons. International treaties and IAEA safeguard standards severely limit plutonium uses and dissemination. It is highly improbable that the molport company should be authorized to sell such a substance. So, I question the content and the value of this website often used by the user Plasmic Physics to support strange nomenclature rules.
All that, simply to say that referring to websites such as http://www.molport.com/ or http://www.chemaxon.com/ for systematic nomenclature purposes can be problematic. Such sites can be useful to draw chemical structures but must always be used with discernment and critical mind. Best regards, Shinkolobwe ( talk) 17:58, 4 December 2010 (UTC)
{{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help)
At the introduction of the article, it is said that "Nitric acid ... is a highly corrosive and toxic strong acid." However, according to the article on Strong acids, it is said that Nitric acid isn't a strong acid, as its pKa is -1.64. According to the data provided on this article, the provided pKa is -1.4. Both are more than the -1.74 threshold.
However, nitric acid is usually referred to as a strong acid. Should the statement be changed into "Nitric acid ... is a highly corrosive and toxic acid and is usually considered to be a strong acid" to be more precise?
Dalcde ( talk) 12:03, 3 May 2011 (UTC)
I propose to merge Aqua fortis into Nitric acid, possibly as a new subsection ("Historical uses"?) of "Uses." Aqua fortis is a small article, and I see no philosophical reason that the two should be separate. (I would suggest keeping the "Alchemical substances" category on the redirect, though.) Roscelese ( talk ⋅ contribs) 23:46, 15 January 2011 (UTC)
It is mentioned under fuming nitric acid that "this grade is much used in the explosive industry"
yet there is not even a mention that nitric acid is used in the explosive industry in the uses section. I find this rather bizarre as the use of nitric acid to create explosives arguably revolutionized weapons of the 19th century.
I believe there should be at least a link to the articles on guncotton, nitroglycerine, perhaps cordite as it includes the previous two, perhaps gelignite as it includes nitrocellulose, Ethylene glycol dinitrate, and Trinitrotoluene, as nitric acid is used in the production of all of these either directly or indirectly. 24.246.70.135 ( talk) 19:01, 2 March 2013 (UTC)
The Lewis structure shown here doesn't show the actual hybrid resonance structure. It's lacking the half bond between the 'N' and the two 'O's not bonded to the hydrogen. — Preceding unsigned comment added by 31.59.94.118 ( talk) 09:53, 2 May 2013 (UTC)
The first part of this section needs to be cleaned up, and at least one reference should be added. The description of the nitration mechanism ("The hydroxyl group will typically strip a hydrogen from the organic molecule to form water, and the remaining nitro group takes the hydrogen's place") is completely erroneous. --El Zarco 23:23, 29 December 2013 (UTC) — Preceding unsigned comment added by ElZarco ( talk • contribs)
As mentioned by another user above, the strength of Nitric acid is controversial. Wikipedia inconsistently describes such an issue since the Strong acid page gives a threshold of "strong acids" at pKa <−1.74, excluding HNO3 with pKa = 1.4, while this page states it's strong.
I'd appreciate any professional explanations so as not to confuse readers and break Wikipedia's reliability.
Thanks! — Preceding unsigned comment added by 58.176.234.103 ( talk) 05:35, 13 September 2014 (UTC)
It is stated that before the Ostwald process it was produced by the Birkeland process. This was used for a limited time in one or a few locations (Norway and possibly a few other places). The main product of the Birkeland process was not nitric acid but "Norway saltpeter", i.e. calcium nitrate or calcum ammonium nitrate. The main pre-Ostwald process was a reaction between saltpeter and sulphuric acid KNO3+H2SO4 => HNO3+KHSO4. The reaction 2 KNO3+H2SO4 => 2 HNO3+K2SO4 was avoided as it produced too much nitric oxides.
The absorption of NO2 in water is often witten as 2 NO2+H2O => HNO3+HNO2, is the nitrous acid decomposing fully or are measures to remove it from the acid produced necessary? Some descriptions mentions a bleaching procedure which I assume relates to the treatment of byproducts (probably named for dealing with excess NO2) Is there a problem to produce concentrations higher than 68% directly by absorbing more NO2 (N2O4)? Is this problem to obtain a dry enough stream of NO2? How is the red fuming acid made, by absorbing even more?
Nitric acid is a major commodity and its production deserves comprehensive treatment i Wikipedia. — Preceding unsigned comment added by 150.227.15.253 ( talk) 15:49, 23 September 2014 (UTC)
Under "Physical and chemical properties", I've tagged the density as inconsistent since it doesn't match what's in the box to its right.
I'm not a physical chemist so I'm not making any body changes, but I think that that section needs minimal text along the lines of "Nitric acid is supplied in several different forms including azeotropic (concentrated) and anhydrous". After that there should be subsections each with a density, I presume that the current 1.42 is correct for azeotropic/conc at some temperature but it's misleading (and I think I've just seen somebody misled) for it to appear as an overall density.
In all cases the measurement conditions should also be given: are these densities for STP or what? MarkMLl ( talk) 09:55, 20 May 2015 (UTC)
Sigma Aldrich cites the density of reagent grade (69-70%) nitric acid at 1.42 [1] KE7KTO ( talk) 15:37, 9 June 2016 (UTC)
Nitric acid isn't toxic. It's corrosive for sure but consists of a hydrogen ion and a nitrate ion, neither of which are toxic, at least not "highly" toxic as the article states. — Preceding unsigned comment added by 184.152.61.223 ( talk) 20:42, 10 June 2012 (UTC)
Well,I know that HNO3 is toxic because it contains NO2
4 HNO3-->2H2O+O2+4 NO2
But I doubt it because it contains nitrate and Hydrogen ions that are not so toxic. So is it slightly toxic,partly,or extremely poisonous? — Preceding unsigned comment added by 76.124.224.179 ( talk) 01:41, 8 July 2012 (UTC)
Nitric acid doesn't contain NO2 unless it's fuming nitric acid. It decomposes into NO2, but on its own doesnt contain any NO2, H+ and NO2-. — Preceding unsigned comment added by 184.152.61.223 ( talk) 21:40, 28 August 2012 (UTC)
Nitrates are mildly toxic, but the real hazards come from either the strong acidity, its ability to oxidize substances into more dangerous oxides or explosive substances, or its decomposition or reactions with the release of nitrogen dioxide. Nitrogen dioxide is much more volatile than sulfuric acid, so (unless sulfuric acid is released as an aerosol) it is far more dangerous than sulfuric acid (barring skin contact not recommended for either). Pbrower2a ( talk) 03:21, 8 February 2018 (UTC)
Synthesis was not recorded circa 800 by Jabir. It is recorded in the "Jabirian corpus" but not until circa 1300 in the Latin De inventione veriatis part of the corpus of Pseudo-Geber. First appearance in print is in 1541. Source Vitriol in the History of Chemistry : by Vladimir Karpenco and John A Norris : from Chem Listy vol 96 2002 pp997-1005. No Jabrian manuscripts survive from 800. Since this is not an alchemical article let us use only verifiable information J8079s ( talk) 00:34, 11 October 2008 (UTC)
I see no good reason to have separate articles for
red fuming nitric acid and
white fuming nitric acid. They are simply grades of nitric acid. I propose to merge them back into the respective sections of this article.
Specific uses call for specific ranges of concentration, but that is true for most compounds.
Those two articles have relatively little contents and low quality, especially the white one. Some of that content seems too technical and dated for Wikipedia, and some of it (such as the NO and NO
2 contents) could be factored out to other sections of this article. --
Jorge Stolfi (
talk)
17:02, 18 February 2019 (UTC)
The article states: “concentration of 68%w/w (or, 68g of HNO3 dissolved in 100ml of water)“. This is wrong; 68%w/w means that 100g diluted acid contains 68g HNO3. Plausibility check: what should 100% mean? 100g of HNO3 dissolved in 100ml of water? Certainly not. Rigus ( talk) 14:42, 6 March 2021 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
In section 3 Production, the original text is "This is subsequently absorbed in water to form nitric acid and nitric oxide. 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) (ΔH = −117 kJ/mol)" However, the enthalpy of reaction is wrong. Instead, the correct value is -135.74 kJ/mol.
The enthalpy of formation for NO2(g), H2O(l), HNO3(aq), and NO(g) are 33.10 kJ/mol [1], -285.83 kJ/mol [2], -206.28 kJ/mol [3], 90.29 kJ/mol [4]. And the enthalpy of the reaction can then be calculated follwing the stoichiometry as 2*(-206.28) + 90.29 - (-285.83) - 3*33.10 kJ/mol = -135.74 kJ/mol.
This value is also consistent with [5]. Z zhenyu ( talk) 16:57, 26 May 2022 (UTC)
References
{{
cite journal}}
: Cite journal requires |journal=
(
help)
{{
cite web}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: Cite journal requires |journal=
(
help)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Suggested addition to NOTES:
Writer Anne McCaffrey, in her Nebula-winning novella Dragonrider, makes reference to a caustic liquid called "agenothree" by the fictional sages of that time and place. [1] Anan Isapta ( talk) 13:50, 15 August 2022 (UTC)
References
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
I recently (7:45 PM, October 24th) got a nitric acid burn and I would like to put the image under the Safety section as I think it would help the readers understand what a nitric acid burn looks like. The image is attached below. It is not very graphic, the skin is only just brown in the burn area. For the caption I will put "A image of a nitric acid burn. The affected skin is brown from the nitric acid reacting with the keratin." Image: https://media.discordapp.net/attachments/891090739688247316/902053196166479923/image4.jpg Thank you. Edward Science Innovators ( talk) 04:38, 25 October 2021 (UTC)
A user always cite this paper http://www.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2266 in different articles, calls it mainstream view and straightly reject views of other academicians. There isn't one but numerous other reliable sources that contradict assertions made by the authors of this article of interest. I can list those sources. Also this article doesn't address the primary sources that are cited by other scholars and contradict statements made by author of this article. For example, here, in case of nitric acid, this article hasn't addressed texts like Liber Luminis Luminum Hu741f4 ( talk) 16:28, 13 February 2023 (UTC)
The close resemblance between the practise of the Jabirian writers and al-Razi is most marked in their passages on such 'sharp waters'. These waters range from simple mixtures to distillates obtained from complex mixtures. They are not always fluid and some of the processes refer to melting rather than dissolution. But among them we find the rudiments of processes which were finally to lead to the discovery of the mineral acids, sulphuric, hydrochloric and nitric. The mineral acids manifest themselves clearly only about three centuries after al-Razi, in the works of Europeans, some of whom were alchemists, but others of whom were concerned with the production of medical elixirs.
It is generally accepted that mineral acids were quite unknown both to the ancients in the West and to the Arabic alchemists.
The text is given here in full because of the prevailing notion that Islamic chemists did not produce mineral acids.
between the time when the Summa perfectionis was written and the seventeenth century, the mineral acids–sulfuric, hydrochloric, nitric, and the mixture of the latter two, called aqua regia, had been discovered.
the tone of an open and fiery polemic against other scholars [...] the tone of the polemics tends to exceed the desirable boundaries of an academic disagreement; Brentjes 2011
The at times rather sharply ideological tone does not improve his arguments.
Verifiability does not guarantee inclusion – While information must be verifiable for inclusion in an article, not all verifiable information must be included. Consensus may determine that certain information does not improve an article. Such information should be omitted or presented instead in a different article. The responsibility for achieving consensus for inclusion is on those seeking to include disputed content.
I don't assume anything, evidence from major historians of chemistry on what the mainstream view is has been presented above. Evidence has also been given that
al-Hassan's work is considered polemical
and ideological
by other scholars, which means that we should use him with care.
WP:DUE/WEIGHT is a core policy, we represent points of view proportionately according to their prominence, not as though they are equivalent and as though we can simply let the reader decide. Relative prominence or weight is crucial, see WP:BALANCE and WP:FALSEBALANCE. Editors can disagree on how the due weight policy applies (i.e., on how prominent a certain view or source is and how it should be presented), but they are not free to simply refuse discussing relative weight.
I propose we first give what all scholars, including al-Hassan himself, admit to be the mainstream view, i.e., that the discovery of mineral acids such as nitric acid is generally believed to go back to 13th-century European alchemy. The minority claims of Holmyard 1931 and al-Hassan 2001 (the former of which is actually outdated and the second self-consciously polemical) should be presented as what they are, i.e., claims contradicting the mainstream view that have not (yet) been generally accepted. Al-Hassan 2001's confused mention of Michael Scot's Liber Luminis luminum should either be relegated to the footnote or left out entirely. Karpenko & Norris 2002 's view should be clearly identified as the one that is in line with the mainstream view. I think calling it "conventional" is a good fit.
My proposal can be read here (the first paragraph of the history section). Let me know what you think. ☿ Apaugasma ( talk ☉) 16:34, 14 February 2023 (UTC)
the tone of an open and fiery polemic against other scholars [...] the tone of the polemics tends to exceed the desirable boundaries of an academic disagreement; Brentjes 2011
The at times rather sharply ideological tone does not improve his arguments." Since this is mainly about Al-Hassan (Holmyard is old and obsolete and so not a good source), I am genuinely curious about any positive reviews of Al-Hassan's work that you may cite? In my experience, his work is not well received by other scholars, who like Ferrario 2010 tend to find it interesting and challenging but marred by its unfounded attacks on other scholars and by its high amount of substantial mistakes and general lack of rigor. Despite Al-Hassan's many attacks on William R. Newman's work (e.g., [1]), Newman hasn't even taken the effort to write a response, which he did do for what are presumable more legitimate criticisms of his work (e.g., [2] [3] [4]). Among historians of chemistry, Al-Hassan's work is considered WP:FRINGE. Again, if this has recently changed, I would be highly interested in any source which shows the contrary. ☿ Apaugasma ( talk ☉) 01:39, 6 April 2023 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
"The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen."
Inorrect usage of "be (is)" vs "has a". A thing has a particular appearance, it is not the appearance itself.
I suggest a change to "... but samples tend to acquire a yellow cast over time due to ..."
2600:1002:B157:77E4:3C3A:7042:6E4A:CB1E ( talk) 10:14, 9 June 2023 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
"The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen."
Inorrect usage of "be (is)" vs "has a". A thing has a particular appearance, it is not the appearance itself.
I suggest a change to "... but samples tend to acquire a yellow cast over time due to ..."
2600:1002:B157:77E4:3C3A:7042:6E4A:CB1E ( talk) 10:14, 9 June 2023 (UTC)
Dear fellow Wikipedians,
I've read the discussion on various claims about the first discovery, and I defer to the opinions of Apaugasma. The only reason I moved Geber up was to make the section a little more chronological. I don't think it is very important now, it gave a good enough overview as it was. But if the earliest history part later expands (cf. Sulfuric acid#History) chronological order among the attributions (generally accepted or not) might be a bit helpful. The Cosmic Ocean (Please feel free to modify or undo any of my edits as deemed appropriate.) 22:00, 27 August 2023 (UTC)
![]() | This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
Archive 1 |
I don't understand the comments about yellow/orange stains: doesn't this acid actually burn skin and corrode it, rather than stain it??? This needs to be clarified, because as written, the article is self-contradicting. Nyh 09:02, 31 Mar 2004 (UTC)
How long does the staining last for? Should I be worried about anything more than cosmetics? 169.237.44.114 21:35, 21 February 2006 (UTC)
What is that "g" after the digit 9 in the molar mass 63.0129g g/mol? Was it a typing error? sentausa 18:02, 9 March 2006 (UTC)
I'm confused with the pKa of nitric.
And I can't find where there has the value -2.
Which one is true?
Is the relation of pKa to the actual Ka value goes like: pKa = -logKa ? Because I'm looking for an actual value of Ka not pKa. Therefore, I think that noting the Ka value of all chemicals in the article table is of some importance, no? 74.96.186.207 00:46, 21 January 2007 (UTC)
what is the formula for nitric acid in acid rain??? O~O —The preceding unsigned comment was added by 86.6.160.152 ( talk) 16:01, 19 February 2007 (UTC).
Hello, I really need an answer to this question for a big school project I am doing. Is nitric acid an ionic or covalent bond? Respond ASAP. Thanx! 67.184.234.126 22:14, 14 May 2007 (UTC)
How to make 99% concentrated Nitric acid? —The preceding unsigned comment was added by 61.5.138.29 ( talk) 12:09, 16 May 2007 (UTC).
One of nitric acid's uses is in acid rain?
==Uses== ... Nitric acid is a component of [[acid rain]]. ...
Surely nitric acid isn't used in acid rain, unless it's in an obscure weapon?-- Steven Weston 21:01, 9 May 2007 (UTC)
that'd be quite a weapon... just TRY and stop it... "its like trying to stop the seasons" ~ —Preceding unsigned comment added by 74.87.82.86 ( talk) 06:34, 6 February 2008 (UTC)
At what concentration does Nitric Acid cause skin to turn yellow?
The NFPA symbol (i think thats the right terminology) is wrong. Health is 4 and reactivity is 3.
The properties of HNO3 are still too vague. Should we add some reactions as illustration for each property?Abelin C A usesobad 14:00, 20 December 2006 (UTC)
The boiling point of pure nitric acid is listed as 83 degrees Celsius. Where was that found? I have plenty of books listing the boiling point as 86 degrees Celsius. —Preceding unsigned comment added by 146.151.43.102 ( talk) 19:53, 12 November 2007 (UTC)
Someone please reword "When boiling in light, even at room temperature..." : I have only a faint idea of wht was meant. 1. Boiling in light? Boiling exposed to light OR at room temperature? Vapors exposed to light? What? 2. Boiling at room temperature - what, reduced pressure? 3. DOES boiling have anything to do with the NOx formation (other than the temperature acceleration)? —Preceding unsigned comment added by 63.81.122.66 ( talk) 16:21, 16 October 2008 (UTC)
It's said in the first few lines of the article that Nitric acid is highly toxic. The acid is indeed very dangerous as a highly corrosive acid and a strong oxidizing agent, but I don't think it's toxic. The nitrate cation appears almost everywhere in the organic world, nitrate salts are used as fertilizers as well, it can't be toxic, at least not highly toxic. - Zhieaanm 12:31, 22 November 2008 (UTC)
Can i concentrate the Nitric acid like H2S04? If not then how can concentrate the Nitric Acid? —The preceding unsigned comment was added by 193.251.135.126 ( talk) 12:45, 28 January 2007 (UTC).
The paragraph on industrial production was cleaned up and citations added. The No Citations reference was removed. Question: Is it appropriate for me to remove this indication, or is there a more formal procedure to decide that citations are adequate? Norm Reitzel ( talk) 13:47, 19 January 2009 (UTC)
Wiki fails again. Birkeland-Eyde Process. http://www.backyardchem.com/nitric-acid.php —Preceding unsigned comment added by 69.152.173.159 ( talk) 07:35, 8 May 2009 (UTC)
Why is it important to state that he was Muslim instead of where he was from? Wouldn't Arab or Persian or Egyptian do? Does one call Archimedes a Pagan scientist, Einstein a Jewish scientist, Galileo a Christian scientist and Feynman an Atheist scientist? —Preceding unsigned comment added by 212.54.216.186 ( talk) 15:49, 28 March 2008 (UTC)
Hi guys, could you elaborate more on the first method of synthesis, where it says "by taking a **** on someones face"?
About the synthesis, it says to convert red to white by using reduced air pressure, giving the values of 27 KPa or 20 mmHg. These are diffrent values by a factor of ten; I'm going to assume it's the higher one (just my intuitive guess) and change it to 27Kpa and 200mmHg. I could be wrong though, does anyone know for sure?-- 2tothe4 01:29, 12 November 2005 (UTC)
Something else... the removal of the NO by reduced pressure makes sense, but wouldn't heating the acid have the same effect? Or would the HNO3 start to dissociate?-- 2tothe4 14:51, 12 November 2005 (UTC)
Doesnt sulfuric acid turn skin yellow as well?
And tantalum, niobium - this at least needs clarifying. An "highest distinction" is a peacock term, and unsuitable. 83.100.250.79 ( talk) 16:08, 7 September 2009 (UTC)
You can add information that Polish sciencist invented method to get nitrous from air :) —Preceding unsigned comment added by 79.186.145.167 ( talk) 20:44, 21 November 2007 (UTC)
Under the section on Culture, I think that the original Batman story of Two-face involved a lawyer who was splashed in the face with nitric acid. Unfortunately, I don't have a reference right now. BTW - the Ira Ramsen story of nitric acid is a personal favourite. Oliver —Preceding unsigned comment added by 207.210.34.14 ( talk) 13:15, 7 October 2009 (UTC)
The intro says "Colorless when pure, and a slight yellow when glacial..." what does "glacial" mean in this context? Maybe this could be explained under the "Grades" heading? —Preceding unsigned comment added by Philwkpd ( talk • contribs) 05:02, 25 August 2009 (UTC)
it means concentrated to the max posible —Preceding unsigned comment added by 129.96.152.50 ( talk) 06:09, 14 September 2009 (UTC)
glacial nitric acid doesn't exist, it is only a valid term for acetic acid, someones making things up
It does exist, I use it in my labs regularly. —Preceding unsigned comment added by 129.96.197.174 ( talk) 02:25, 9 October 2009 (UTC)
I removed the statement about nitric acid being used by the ancient Egyptians; it seems dubious and is not backed up by a given external source. Can anyone find a source for that statement? Algebra 00:37, 6 December 2006 (UTC)
I believe that was referring to the nitric acid battery like pottery that some archaeologists found, they were filled with nitric acid I believe and had something like an iron pipe inside of another pipe, dipped in nitric acid inside of a jar, and sealed with a tar or resin like substance. more research is necessary, but I do believe that it was mentioned on an episode of myth busters awhile back, turned out to be a legitimate source of electricity and could provide enough voltage to be felt through one's skin....
There is an edge-of-archeology belief (almost UFOparanoids)that the Babylonians, not Egyptians were able to electroplate using the easier to make Sulfuric acid w/lead plates. First mention I can remember off-hand is Electronics Illustrated article of 1960s.
COULD the Babylonians have stumbled on weak sulfuric, yeh, and they had lead and left some peculiar pottery. Batteries?? electroplating... long stretch.
Am currently searching for legit aqua fortis info pre-Pyrotechnia (15th C., CE by which time it was common and produced on industrial scale. Theophilius does not mention it, but supposedly half-mystic Ramon Lull (inventor of various mnemonic memory systems and methods of receiving advice from Christian angels) and an uncorrupted ms. of le Grand Albert work of Albertus Magnus)(my interpretation of peculiar identifications found in 1911 Britannica which seem VERY wrong (speaking of Albert 'the grand' and Albert 'the small' as HRE electors) is confusing people with books (see an accurate footnote in the prologue of Eco's Name of the Rose) Aqua Fortis is *not* identifiable in the Corning Glass ed. of the Mappa Clavicula, earliest known Euro mss. on practical metalwork.
WinstonSmith —Preceding
unsigned comment added by
74.108.139.186 (
talk)
21:40, 21 October 2009 (UTC)
"Nitric acid is also featured on the "Pern" books by Anne McCaffrey, where it is known as "agenothree" because of linguistic drift." Doesn't this sound like AgNO3 - silver nitrate? Nitric acid would be eitchenothree. The part cites the book directly which proves that it can be a mix up. -- 188.2.116.37 ( talk) 10:00, 7 December 2009 (UTC)
shouldnt it be 'due to its tendency to adsorb oxygen from the atmosphere.'? —Preceding unsigned comment added by 99.229.206.22 ( talk) 10:46, 27 November 2009 (UTC)
The sources listed do not support the article; no mention of nitric acid is made. New sources have to be identified to support this assertion, or the Ressam passage will be removed. Bobkeyes ( talk) 00:33, 13 April 2010 (UTC)
I notice an anonymous person has selected the non-UK spellings of both "sulfur" and "niter" - which is fine with me. However, I will point out that when "nitre" was being calcined with clay and green vitreol, it was being done in Europe, so the presumption is that the substance being used was in fact "nitre." Norm Reitzel ( talk) 22:34, 28 June 2010 (UTC)
A Google search (on 30-11-2010) with Oxoazinic acid only renders 247 results, most from http://www.molport.com or from obscure websites selling chemicals. A common characteristic is that all these sites use the Chemaxon program for automatically generating this name. This name is never used by chemists and very misleading for inexperienced readers. Such a name should be banned from the chembox for avoiding confusing Wikipedia audience and propagating bad nomenclature practices. Thanks, Shinkolobwe ( talk) 22:05, 30 November 2010 (UTC)
Main discussion at Wikipedia_talk:WikiProject_Chemicals#Controversial_use_of_the_term_.E2.80.98Oxoazinic_acid.E2.80.99_in_the_chembox_of_Nitric_acid.
I propose to totally omit the term ‘oxoazinic acid’ from the chembox of nitric acid because it seems mostly to be used by spammers or crasy websites supposed to sell chemicals and never by honorable chemical companies such as, e.g., Sigma Aldrich or Merck.
Before adding obscure, or worse, inexact, nomenclature terms to Wikipedia, it is necessary to pay attention to the impact it might have in the real world. Wikipedia is more and more renowned in the field of science and techniques and increasingly used by students or professionals in various fields. Often now, Wikipedia behaves like a resonance box or an amplification system and is also frequently wildly recopied by other websites for unknown purposes. According an inadequate importance to obscure terms such as 'oxoazinic acid' and worse, promoting them as “SystematicName” or “IUPACName” in chemboxes could encourage their use worldwide and in a few years, it could be extremely difficult, if not impossible, to get rid of an erroneous and embarrassing nomenclature. As for a viral infection, a bad habit should be immediately stopped in the egg and no chance left to an ugly contamination to propagate and to develop into a pandemia.
Today, I resumed again my search attempts to collect valuable information about the term 'oxoazinic acid'. Hereafter, the very disappointing results returned by three well established search engines:
- Google: only 245 results (most of them from http://www.molport.com or from spammers sites trying to sell chemicals !);
- Google Scholar: only 1 results !
- ScienceDirect: only 1 results: Article in Press, Corrected Proof, not yet published: [1]
“A new approach to predict the strength of high energy materials” Original Research Article. Journal of Hazardous Materials, In Press, Corrected Proof, Available online 2 November 2010. Mohammad Hossein Keshavarz, Mohammad Ghorbanifaraz, Hadi Rahimi, Mehdi Rahmani. Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr, P.O. Box 83145/115, Islamic Republic of Iran.
From the abstract of this paper, it is not possible to verify the claim proposed by the contributor Plasmic Physics because the term 'oxoazinic acid' does not appear in the abstract itself, nor in the title of the paper. The term 'oxoazinic acid' could be attributable to any of the functional groups associated to the compounds cited in the abstract: nitroaromatics, acyclic and cyclic nitramines, nitrate esters and nitroaliphatics.
Ordering the paper costs US $ 41.95 and could causes notable troubles to the person making the order because of the delicate character of the subject treated and the possible negative implications in the daily life. So, in the practice, the information about 'oxoazinic acid' presumably given in the paper cannot be easily verified and such a reference does not fulfill its basic objective, nor confirm anything.
Adding an isolated and obscure reference from a paper even not yet published does not constitute a proof or a valuable argument to demonstrate a doubtful terminology.
This is why, I would suggest to also remove this reference from the main page of nitric acid.
The website of http://www.molport.com also contains unreliable information on strange chemical compounds. One of my most surprising finding was the following one:
Oxoazinic acid plutonium: HNO3Pu
http://www.molport.com/buy-chemicals/moleculelink/about-this-molecule/6107333
Not only, this approximate term does not reflect the very complex chemistry of plutonium, a redox-sensitive radionuclides with multiple valences, but the molport company even proposes to sell it ! As plutonium is a strategic fissile material (and also a highly radiotoxic alpha emitter), its use is severely restricted to avoid the proliferation of nuclear weapons. International treaties and IAEA safeguard standards severely limit plutonium uses and dissemination. It is highly improbable that the molport company should be authorized to sell such a substance. So, I question the content and the value of this website often used by the user Plasmic Physics to support strange nomenclature rules.
All that, simply to say that referring to websites such as http://www.molport.com/ or http://www.chemaxon.com/ for systematic nomenclature purposes can be problematic. Such sites can be useful to draw chemical structures but must always be used with discernment and critical mind. Best regards, Shinkolobwe ( talk) 17:58, 4 December 2010 (UTC)
{{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help)
At the introduction of the article, it is said that "Nitric acid ... is a highly corrosive and toxic strong acid." However, according to the article on Strong acids, it is said that Nitric acid isn't a strong acid, as its pKa is -1.64. According to the data provided on this article, the provided pKa is -1.4. Both are more than the -1.74 threshold.
However, nitric acid is usually referred to as a strong acid. Should the statement be changed into "Nitric acid ... is a highly corrosive and toxic acid and is usually considered to be a strong acid" to be more precise?
Dalcde ( talk) 12:03, 3 May 2011 (UTC)
I propose to merge Aqua fortis into Nitric acid, possibly as a new subsection ("Historical uses"?) of "Uses." Aqua fortis is a small article, and I see no philosophical reason that the two should be separate. (I would suggest keeping the "Alchemical substances" category on the redirect, though.) Roscelese ( talk ⋅ contribs) 23:46, 15 January 2011 (UTC)
It is mentioned under fuming nitric acid that "this grade is much used in the explosive industry"
yet there is not even a mention that nitric acid is used in the explosive industry in the uses section. I find this rather bizarre as the use of nitric acid to create explosives arguably revolutionized weapons of the 19th century.
I believe there should be at least a link to the articles on guncotton, nitroglycerine, perhaps cordite as it includes the previous two, perhaps gelignite as it includes nitrocellulose, Ethylene glycol dinitrate, and Trinitrotoluene, as nitric acid is used in the production of all of these either directly or indirectly. 24.246.70.135 ( talk) 19:01, 2 March 2013 (UTC)
The Lewis structure shown here doesn't show the actual hybrid resonance structure. It's lacking the half bond between the 'N' and the two 'O's not bonded to the hydrogen. — Preceding unsigned comment added by 31.59.94.118 ( talk) 09:53, 2 May 2013 (UTC)
The first part of this section needs to be cleaned up, and at least one reference should be added. The description of the nitration mechanism ("The hydroxyl group will typically strip a hydrogen from the organic molecule to form water, and the remaining nitro group takes the hydrogen's place") is completely erroneous. --El Zarco 23:23, 29 December 2013 (UTC) — Preceding unsigned comment added by ElZarco ( talk • contribs)
As mentioned by another user above, the strength of Nitric acid is controversial. Wikipedia inconsistently describes such an issue since the Strong acid page gives a threshold of "strong acids" at pKa <−1.74, excluding HNO3 with pKa = 1.4, while this page states it's strong.
I'd appreciate any professional explanations so as not to confuse readers and break Wikipedia's reliability.
Thanks! — Preceding unsigned comment added by 58.176.234.103 ( talk) 05:35, 13 September 2014 (UTC)
It is stated that before the Ostwald process it was produced by the Birkeland process. This was used for a limited time in one or a few locations (Norway and possibly a few other places). The main product of the Birkeland process was not nitric acid but "Norway saltpeter", i.e. calcium nitrate or calcum ammonium nitrate. The main pre-Ostwald process was a reaction between saltpeter and sulphuric acid KNO3+H2SO4 => HNO3+KHSO4. The reaction 2 KNO3+H2SO4 => 2 HNO3+K2SO4 was avoided as it produced too much nitric oxides.
The absorption of NO2 in water is often witten as 2 NO2+H2O => HNO3+HNO2, is the nitrous acid decomposing fully or are measures to remove it from the acid produced necessary? Some descriptions mentions a bleaching procedure which I assume relates to the treatment of byproducts (probably named for dealing with excess NO2) Is there a problem to produce concentrations higher than 68% directly by absorbing more NO2 (N2O4)? Is this problem to obtain a dry enough stream of NO2? How is the red fuming acid made, by absorbing even more?
Nitric acid is a major commodity and its production deserves comprehensive treatment i Wikipedia. — Preceding unsigned comment added by 150.227.15.253 ( talk) 15:49, 23 September 2014 (UTC)
Under "Physical and chemical properties", I've tagged the density as inconsistent since it doesn't match what's in the box to its right.
I'm not a physical chemist so I'm not making any body changes, but I think that that section needs minimal text along the lines of "Nitric acid is supplied in several different forms including azeotropic (concentrated) and anhydrous". After that there should be subsections each with a density, I presume that the current 1.42 is correct for azeotropic/conc at some temperature but it's misleading (and I think I've just seen somebody misled) for it to appear as an overall density.
In all cases the measurement conditions should also be given: are these densities for STP or what? MarkMLl ( talk) 09:55, 20 May 2015 (UTC)
Sigma Aldrich cites the density of reagent grade (69-70%) nitric acid at 1.42 [1] KE7KTO ( talk) 15:37, 9 June 2016 (UTC)
Nitric acid isn't toxic. It's corrosive for sure but consists of a hydrogen ion and a nitrate ion, neither of which are toxic, at least not "highly" toxic as the article states. — Preceding unsigned comment added by 184.152.61.223 ( talk) 20:42, 10 June 2012 (UTC)
Well,I know that HNO3 is toxic because it contains NO2
4 HNO3-->2H2O+O2+4 NO2
But I doubt it because it contains nitrate and Hydrogen ions that are not so toxic. So is it slightly toxic,partly,or extremely poisonous? — Preceding unsigned comment added by 76.124.224.179 ( talk) 01:41, 8 July 2012 (UTC)
Nitric acid doesn't contain NO2 unless it's fuming nitric acid. It decomposes into NO2, but on its own doesnt contain any NO2, H+ and NO2-. — Preceding unsigned comment added by 184.152.61.223 ( talk) 21:40, 28 August 2012 (UTC)
Nitrates are mildly toxic, but the real hazards come from either the strong acidity, its ability to oxidize substances into more dangerous oxides or explosive substances, or its decomposition or reactions with the release of nitrogen dioxide. Nitrogen dioxide is much more volatile than sulfuric acid, so (unless sulfuric acid is released as an aerosol) it is far more dangerous than sulfuric acid (barring skin contact not recommended for either). Pbrower2a ( talk) 03:21, 8 February 2018 (UTC)
Synthesis was not recorded circa 800 by Jabir. It is recorded in the "Jabirian corpus" but not until circa 1300 in the Latin De inventione veriatis part of the corpus of Pseudo-Geber. First appearance in print is in 1541. Source Vitriol in the History of Chemistry : by Vladimir Karpenco and John A Norris : from Chem Listy vol 96 2002 pp997-1005. No Jabrian manuscripts survive from 800. Since this is not an alchemical article let us use only verifiable information J8079s ( talk) 00:34, 11 October 2008 (UTC)
I see no good reason to have separate articles for
red fuming nitric acid and
white fuming nitric acid. They are simply grades of nitric acid. I propose to merge them back into the respective sections of this article.
Specific uses call for specific ranges of concentration, but that is true for most compounds.
Those two articles have relatively little contents and low quality, especially the white one. Some of that content seems too technical and dated for Wikipedia, and some of it (such as the NO and NO
2 contents) could be factored out to other sections of this article. --
Jorge Stolfi (
talk)
17:02, 18 February 2019 (UTC)
The article states: “concentration of 68%w/w (or, 68g of HNO3 dissolved in 100ml of water)“. This is wrong; 68%w/w means that 100g diluted acid contains 68g HNO3. Plausibility check: what should 100% mean? 100g of HNO3 dissolved in 100ml of water? Certainly not. Rigus ( talk) 14:42, 6 March 2021 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
In section 3 Production, the original text is "This is subsequently absorbed in water to form nitric acid and nitric oxide. 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) (ΔH = −117 kJ/mol)" However, the enthalpy of reaction is wrong. Instead, the correct value is -135.74 kJ/mol.
The enthalpy of formation for NO2(g), H2O(l), HNO3(aq), and NO(g) are 33.10 kJ/mol [1], -285.83 kJ/mol [2], -206.28 kJ/mol [3], 90.29 kJ/mol [4]. And the enthalpy of the reaction can then be calculated follwing the stoichiometry as 2*(-206.28) + 90.29 - (-285.83) - 3*33.10 kJ/mol = -135.74 kJ/mol.
This value is also consistent with [5]. Z zhenyu ( talk) 16:57, 26 May 2022 (UTC)
References
{{
cite journal}}
: Cite journal requires |journal=
(
help)
{{
cite web}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: Cite journal requires |journal=
(
help)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Suggested addition to NOTES:
Writer Anne McCaffrey, in her Nebula-winning novella Dragonrider, makes reference to a caustic liquid called "agenothree" by the fictional sages of that time and place. [1] Anan Isapta ( talk) 13:50, 15 August 2022 (UTC)
References
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
I recently (7:45 PM, October 24th) got a nitric acid burn and I would like to put the image under the Safety section as I think it would help the readers understand what a nitric acid burn looks like. The image is attached below. It is not very graphic, the skin is only just brown in the burn area. For the caption I will put "A image of a nitric acid burn. The affected skin is brown from the nitric acid reacting with the keratin." Image: https://media.discordapp.net/attachments/891090739688247316/902053196166479923/image4.jpg Thank you. Edward Science Innovators ( talk) 04:38, 25 October 2021 (UTC)
A user always cite this paper http://www.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2266 in different articles, calls it mainstream view and straightly reject views of other academicians. There isn't one but numerous other reliable sources that contradict assertions made by the authors of this article of interest. I can list those sources. Also this article doesn't address the primary sources that are cited by other scholars and contradict statements made by author of this article. For example, here, in case of nitric acid, this article hasn't addressed texts like Liber Luminis Luminum Hu741f4 ( talk) 16:28, 13 February 2023 (UTC)
The close resemblance between the practise of the Jabirian writers and al-Razi is most marked in their passages on such 'sharp waters'. These waters range from simple mixtures to distillates obtained from complex mixtures. They are not always fluid and some of the processes refer to melting rather than dissolution. But among them we find the rudiments of processes which were finally to lead to the discovery of the mineral acids, sulphuric, hydrochloric and nitric. The mineral acids manifest themselves clearly only about three centuries after al-Razi, in the works of Europeans, some of whom were alchemists, but others of whom were concerned with the production of medical elixirs.
It is generally accepted that mineral acids were quite unknown both to the ancients in the West and to the Arabic alchemists.
The text is given here in full because of the prevailing notion that Islamic chemists did not produce mineral acids.
between the time when the Summa perfectionis was written and the seventeenth century, the mineral acids–sulfuric, hydrochloric, nitric, and the mixture of the latter two, called aqua regia, had been discovered.
the tone of an open and fiery polemic against other scholars [...] the tone of the polemics tends to exceed the desirable boundaries of an academic disagreement; Brentjes 2011
The at times rather sharply ideological tone does not improve his arguments.
Verifiability does not guarantee inclusion – While information must be verifiable for inclusion in an article, not all verifiable information must be included. Consensus may determine that certain information does not improve an article. Such information should be omitted or presented instead in a different article. The responsibility for achieving consensus for inclusion is on those seeking to include disputed content.
I don't assume anything, evidence from major historians of chemistry on what the mainstream view is has been presented above. Evidence has also been given that
al-Hassan's work is considered polemical
and ideological
by other scholars, which means that we should use him with care.
WP:DUE/WEIGHT is a core policy, we represent points of view proportionately according to their prominence, not as though they are equivalent and as though we can simply let the reader decide. Relative prominence or weight is crucial, see WP:BALANCE and WP:FALSEBALANCE. Editors can disagree on how the due weight policy applies (i.e., on how prominent a certain view or source is and how it should be presented), but they are not free to simply refuse discussing relative weight.
I propose we first give what all scholars, including al-Hassan himself, admit to be the mainstream view, i.e., that the discovery of mineral acids such as nitric acid is generally believed to go back to 13th-century European alchemy. The minority claims of Holmyard 1931 and al-Hassan 2001 (the former of which is actually outdated and the second self-consciously polemical) should be presented as what they are, i.e., claims contradicting the mainstream view that have not (yet) been generally accepted. Al-Hassan 2001's confused mention of Michael Scot's Liber Luminis luminum should either be relegated to the footnote or left out entirely. Karpenko & Norris 2002 's view should be clearly identified as the one that is in line with the mainstream view. I think calling it "conventional" is a good fit.
My proposal can be read here (the first paragraph of the history section). Let me know what you think. ☿ Apaugasma ( talk ☉) 16:34, 14 February 2023 (UTC)
the tone of an open and fiery polemic against other scholars [...] the tone of the polemics tends to exceed the desirable boundaries of an academic disagreement; Brentjes 2011
The at times rather sharply ideological tone does not improve his arguments." Since this is mainly about Al-Hassan (Holmyard is old and obsolete and so not a good source), I am genuinely curious about any positive reviews of Al-Hassan's work that you may cite? In my experience, his work is not well received by other scholars, who like Ferrario 2010 tend to find it interesting and challenging but marred by its unfounded attacks on other scholars and by its high amount of substantial mistakes and general lack of rigor. Despite Al-Hassan's many attacks on William R. Newman's work (e.g., [1]), Newman hasn't even taken the effort to write a response, which he did do for what are presumable more legitimate criticisms of his work (e.g., [2] [3] [4]). Among historians of chemistry, Al-Hassan's work is considered WP:FRINGE. Again, if this has recently changed, I would be highly interested in any source which shows the contrary. ☿ Apaugasma ( talk ☉) 01:39, 6 April 2023 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
"The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen."
Inorrect usage of "be (is)" vs "has a". A thing has a particular appearance, it is not the appearance itself.
I suggest a change to "... but samples tend to acquire a yellow cast over time due to ..."
2600:1002:B157:77E4:3C3A:7042:6E4A:CB1E ( talk) 10:14, 9 June 2023 (UTC)
![]() | This
edit request to
Nitric acid has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
"The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen."
Inorrect usage of "be (is)" vs "has a". A thing has a particular appearance, it is not the appearance itself.
I suggest a change to "... but samples tend to acquire a yellow cast over time due to ..."
2600:1002:B157:77E4:3C3A:7042:6E4A:CB1E ( talk) 10:14, 9 June 2023 (UTC)
Dear fellow Wikipedians,
I've read the discussion on various claims about the first discovery, and I defer to the opinions of Apaugasma. The only reason I moved Geber up was to make the section a little more chronological. I don't think it is very important now, it gave a good enough overview as it was. But if the earliest history part later expands (cf. Sulfuric acid#History) chronological order among the attributions (generally accepted or not) might be a bit helpful. The Cosmic Ocean (Please feel free to modify or undo any of my edits as deemed appropriate.) 22:00, 27 August 2023 (UTC)