Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 14 - Acids and Bases - Questions for Review and Thought - Topical Questions - Page 652b: 38a


The "Acid A" is stronger. Because its $K_a$ value is greater.

Work Step by Step

When comparing the strength of acids, the one with a higher $K_a$ value is considered stronger. Analyzing the Ka values: $K_a$ (Acid A) = $1 \times 10^{-5}$ and $K_a$ (Acid Z) = $5 \times 10^{-6}$ Since $1 \times 10^{-5} > 5 \times 10^{-6}$, the "Acid A" is stronger.
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