Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 16 Principles of Chemical Reactivity: The Chemistry of Acids and Bases - 16-3 Equilibrium Constants for Acids and Bases - Review & Check for Section 16-3 - Page 598: 3

Answer

A

Work Step by Step

pKa = 4.20 means that the $Ka=6.31\times10^{-5}$ From the table that's benzoic acid.
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