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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.
An acid with a pK value less than -1.76.This applies only to aqueous solutions
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
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the study of bond
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)