0
$\begingroup$

I was doing an experiment in lab and found that about one-third of p-nitrophenol dissolved in $\ce{NaHCO3}$ solution with liberation of $\ce{CO2}$ in small amount. This is contradictory to what most textbooks say. I was surprised as p-nitrophenol is less acidic than carbonic acid yet it gave positive $\ce{NaHCO3}$ test.

Can anyone give any possible explanation? I thought that one reason maybe that since their $\mathrm{pK}_\mathrm a$ differ by about $1$, the reaction maybe in equilibrium to a significant extent, but this kind of thing isn't mentioned anywhere.

$\endgroup$
  • $\begingroup$ Perhaps the textbook is wrong. Seeing is believing. :) $\endgroup$ – Pritt Balagopal May 15 '17 at 7:00
  • $\begingroup$ Experimental details matter here, but are lacking from your question. $\endgroup$ – Zhe Feb 22 '18 at 15:10

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.