Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 16 - Self-Assessment Quiz - Page 768: Q15


(a) $HClO_2$ has the largest $K_a$.

Work Step by Step

The only difference between these 3 acids is the central atom. With a more electronegative central atom, the H-O bond gets more weak and polarizes, making the oxyacid more acidic. Since Chlorine is the most electronegative of these 3, $HClO_2$ is the stronger acid, which means the largest $K_a$.
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