Answered: OH но OH OH phthalic acid isophthalic…

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OH но OH OH phthalic acid isophthalic acid pKat = 2.9 pKa2 = 5.4 pKat = 3.7 pKa2 = 4.6 %3D

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.1QAP

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Concept explainers

Amines

Amines are organic compounds with a nitrogen atom having a lone pair of electrons on it. They are derived from ammonia (NH3) wherein hydrogen atoms are substituted by an aryl or alkyl group.

Question

Phthalic acid and isophthalic acid have protons on two carboxy groups that can be removed with base. (a) Explain why the pKa for loss of the first proton (pKa1) is lower for phthalic acid than isophthalic acid. (b) Explain why the pKa for loss of the second proton (pKa2) is higher for phthalic acid than isophthalic acid.

OH
но
OH
OH
phthalic acid
isophthalic acid
pKat = 2.9
pKa2 = 5.4
pKat = 3.7
pKa2 = 4.6
%3D

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