Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 16 - Acid-Base Equilibria - Exercises - Page 720: 16.88e


Benzoic acid is stronger than phenol because, the extra "O" in $C_6H_5COOH$ increases the $O-H$ bond polarity, which increases the acidity of the compound.

Work Step by Step

This happens because, since $O$ is electronegative, it attracts the electrons from the hydrogen, increasing the bond polarity.
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