Answer
Pyruvic acid is stronger.
Work Step by Step
The acid with the higher $K_a$ value is the stronger.
Since $3.2 \times 10^{-3}(Pyruvic) > 1.5 \times 10^{-4}(Lactic)$
Pyruvic acid is the stronger.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 14 - Acids and Bases - Conceptual Exercise 14.11 - Acid Strengths - Page 625: a
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