Talk:Chemistry

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Former featured article candidateChemistry is a former featured article candidate. Please view the links under Article milestones below to see why the nomination failed. For older candidates, please check the archive.
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March 16, 2007Featured article candidateNot promoted
June 30, 2008Good article nomineeNot listed
Current status: Former featured article candidate

Acid strength definition[edit]

If this is the wrong place to make this comment, please move it to the right place.

Buffer capacity for a 0.1 M aqueous solution of an acid with pKa of 7

Empirically, an acid can be said to be completely dissociated in solution when the concentration of molecules, HA, is below the detection limit for the species. There appear to be two, mutually incompatible, ways of quantifying what a strong acid is. See acid strength and acid dissociation constant for details.

  1. An acid with a pK value less than -1.76.This applies only to aqueous solutions
  2. An acid which is effectively 100% dissociated in solution

The first is the number -log10 55.5. 55.5 is the concentration/1M of H2O pure water. This seems to be the criterion commonly used for designating a compound as a superacid.

The second depends on the buffer capacity of the solvent, which rises very steeply with decreasing pH, starting at about pH 1 in aqueous solutions. This is independent of the pK value of the acid and is the cause of the solvent levelling effect.

What, if anything, should be done in WP about this contradictory state of affairs? Petergans (talk) 09:35, 19 July 2018 (UTC)

Semi-protected edit request on 2 September 2018[edit]

chemical properties the study of bond matter inorganic chemistry organic chemistry practical aspect in chemistry>

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. -- Ed (Edgar181) 12:23, 2 September 2018 (UTC)

https://www.dailymail.co.uk/news/article-6454101/Rare-yellow-snow-blankets-north-west-China-freezing-temperatures-sandstorms.html[edit]

86.170.89.228 (talk) 13:29, 3 December 2018 (UTC)

  • I do not think this would help our chemistry articles forward. Propose archive/remove. -DePiep (talk) 23:37, 29 December 2018 (UTC)
Also, daily mail. IWI (chat) 16:02, 13 March 2019 (UTC)
Of course, there is the medical advice by Frank Zappa: "Don't eat the yellow snow", but Wikipedia is not a manual. -DePiep (talk) 16:57, 13 March 2019 (UTC)
Ha ha. IWI (chat) 23:25, 14 March 2019 (UTC)

Chembox (again!)[edit]

The chembox is unnecessarily intrusive. My latest encounter with this issue is in salen. It is unsightly because of the presence of both chembox and chemical structures in a relatively short article.

I suggest that all but essential items in the chembox should normally be collapsed.

Users cannot work on the chembox because its source code is not editable in WP. Petergans (talk) 08:49, 29 April 2019 (UTC)