1
$\begingroup$

Sulfuric acid is a strong acid ($\mathrm{p}K_\mathrm{a}$ value below that of $\ce{H3O+}$: completely dissociated in water) at its first deprotonation, but is a weak acid ($\mathrm{p}K_\mathrm{a}$ value over that of $\ce{H3O+}$) in its second one.

Does it also hold for 2-sulfopropanedioic acid too, being a strong acid at its first deprotonation and being weak acids at its second to fourth deprotonations?

$\endgroup$
  • 1
    $\begingroup$ Probably you get a weak second stage. Second deprotonation has to come from a carboxyl group -> expected to be a weak acid. $\endgroup$ – Oscar Lanzi Nov 28 '19 at 11:58
  • 1
    $\begingroup$ Yes, the rest of pKa values should be only a bit lower then for malonic acid. There's no 4th value to speak of though. $\endgroup$ – Mithoron Nov 28 '19 at 18:15
  • $\begingroup$ I think the 4th deprotonation should be deprotonation from the alpha-carbon. $\endgroup$ – Just A Young Artist Dec 2 '19 at 1:25

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.