Talk:Acid

message: The subsection Vinylogous carboxylic acids contains two serious errors. 
#It is not true the proton donor is a carbon atom. A vinylogous carboxylic acid has a structure O=C-C=C-O-H. with an O-H proton donor joined to an O=C electron withdrawing group by a C=C ("vinyl" although at least one H is missing). Ascorbic acid for example is an oxygen acid and not a carbon acid - see the structures of acid and conjugate base at Ascorbic acid#Acidity. 
#The other example is Meldrum's acid which is a carbon acid, but it is not a vinylogous acid as it has no C=C double bond.
Possible fixes:
#Delete the incorrect statements and leave just the one example of ascorbic acid without comment.
#Change the subsection title to something like Organic acids without a -COOH group, with several types. A good source would be an article by Perez and Perez (J. Chem. Educ. 77, 910 (2000)), who discuss three types of organic acids without -COOH which are strong enough that some molecules were first named acids before their correct structure was known - a) phenols and similar, b) vinylogous carboxylic acids (including ascorbic), and c) carbon acids (including Meldrum's).
#Delete the subsection entirely as none of these are really Common acids, which is the section of which this is a subsection. And perhaps put the above list to the article on Organic acids.
Comments? Dirac66 (talk) 22:21, 3 June 2012 (UTC)
thread_title:  Vinylogous subsection errors 

message: There is no mention about dilution of acids. I failed to find any other article discussing on it. We have sections for neutralization and acid strengths, but not for this. Shall the dilution of acid, its precaution, exceptions to HF etc. be included (To make this article complete)? Vanischenu mTalk 11:53, 19 July 2012 (UTC)
thread_title:  Diluting acids (might not be helpful, though) 

message: and tartaric acid (a solid used in baking).
That would be a component of baking powder, not just "baking"  — Preceding unsigned comment added by 64.229.143.161 (talk) 22:29, 23 October 2015 (UTC)
replies: text: Yes, "baking powder" would be more accurate than "baking". However another point is that baking powders contain not tartaric acid but rather its monopotassium salt, potassium bitartrate. If this were corrected, the example would be probably too complex to mention in the intro, so I suggest removing tartaric acid from the intro. It would still remain in the list of Carboxylic acids in the last section. Dirac66 (talk) 02:14, 24 October 2015 (UTC)
replies: text: I have now replaced this example with citric acid (found in citrus fruits) which is a more straightforward example. (At least since we are not discussing structure at this point). Dirac66 (talk) 17:36, 1 May 2016 (UTC)
thread_title:  A s:olid used in baking 

message: The list of references tag should be at the very top of the page, above the hatnotes. Please fix that; it is getting on my nerves. Not a creative person (talk) 12:27, 2 February 2016 (UTC)
thread_title:  Edit request 

message: The very first paragraph describes quite correctly what "an acid" is. I have added a sentence (at the end of the second paragraph) that points out that "an acid" will not refer to a Lewis acid, since chemists refer to a Lewis acid as "a Lewis acid", while "an acid" is implicitly an Arrhenius or Brønsted-Lowry acid. So the lead section of this article (which, by the way, is mostly not my work) does not need to be rewritten in a major way. The "warning" tag with the exclamation point at the top of the page should be removed.
[It may seem surprising that "a Lewis acid" is usually not considered "an acid". But this situation is not so unusual for compound words. For instance, “a gun” hardly ever refers to “a heat gun”; the standard definition of “brush” does not include “air brush”; and “a crosswalk” is not included in the definition of “a walk”. And consider an even more extreme example: A "dwarf planet" is never a planet, according to many sources, including Wikipedia: "A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite." ]
Klaus Schmidt-Rohr (talk) 16:45, 23 May 2016 (UTC)
replies: text: I think you're missing the point. The lead is not the "Definition" section. The current version rambles about different definitions and characteristics without capturing much of the essentials of the article below. Ideally, a lede should be a "mini-article". --vuo (talk) 08:40, 20 June 2016 (UTC)
thread_title:  No lead rewrite needed 

message: "For the narcotic, see Lysergic acid diethylamide." LSD is not a narcotic, except in the outdated/US-legal sense of the word (see intro for Narcotic: "originally referred medically to any psychoactive compound with sleep-inducing properties. In the United States, it has since become associated with opiates and opioids ... Legally speaking, the term "narcotic" is imprecisely defined and typically has negative connotations. When used in a legal context in the U.S., a narcotic drug is simply one that is totally prohibited"). LSD's text rightly omits the term "narcotic" except in some very specific legal context (the name of a document) and some citation titles, and calls it a "psychedelic drug". I'd be happy with just "drug". I know this is minor (pet peeve I guess) but the term "narcotic" is out of place here as reflected elsewhere on Wikipedia. 50.64.72.233 (talk) 09:23, 23 February 2017 (UTC)
thread_title:  Disambiguation text on LSD 

message: I propose to merge diprotic acid into Acid. As can be seen at the top of this talk page, the other sub-pages for acids (polyprotic, monoprotic, monobasic, tribasic) have all been merged here. Monobasic and tribasic were merged by me as they were easily merged, following the reasoning for merger here Talk:Acid/Archive_1#Merge_Monoprotic_Acids. Diprotic acid is harder to merge as the content is very extensive, hence listing here for discussion as to how that can be done and the content generalized to include all acids.--Officer781 (talk) 07:23, 16 September 2018 (UTC)
replies: text: Update: I have transferred the "In daily life" section over to acid. Am wondering how to generalize the "titration" section to acids.--Officer781 (talk) 01:21, 17 September 2018 (UTC)
replies: text: Update: I have transferred the "titration" section to acid article but have otherwise kept the phrasing as an example. Leaving the generalization to later.--Officer781 (talk) 01:54, 17 September 2018 (UTC)
replies: text: Update: Completed merger of both articles. If anyone objects they can post here.--Officer781 (talk) 02:00, 17 September 2018 (UTC)
thread_title:  [[Diprotic acid]] merger proposal