Benzoic acid C6H5COOH is a commonly used antimicrobial preservative in food and beverages, especially in carbonated beverages. A 0.050 M solution of C6H5COOH has a pH of 2.75. Calculate the Ka value for this acid. Express the equilibrium constant to two significant figures.

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.83QE
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Benzoic acid C6H5COOH is a commonly used antimicrobial preservative in food and beverages, especially in carbonated beverages. A 0.050 M solution of C6H5COOH has a pH of 2.75.

Calculate the Ka value for this acid.
Express the equilibrium constant to two significant figures.
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