The Ka for acetic acid drops from 1.76 × 10-5 at 25°C to 1.63 × 10-5 at 50°C. Between the same two temperatures, Kw increases from 1.00 × 10-14 to 5.47 × 10-14. At 50°C the density of a 0.10 M solution of acetic acid is 98.81%of its density at 25°C. Will the pH of a 0.10 M solution ofacetic acid in water increase, decrease, or remain the samewhen it is heated from 25°C to 50°C? Explain.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
Section: Chapter Questions
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The Ka for acetic acid drops from 1.76 × 10-5 at 25°C to 1.63 × 10-5 at 50°C. Between the same two temperatures, Kw increases from 1.00 × 10-14 to 5.47 × 10-14. At 50°C the density of a 0.10 M solution of acetic acid is 98.81%
of its density at 25°C. Will the pH of a 0.10 M solution of
acetic acid in water increase, decrease, or remain the same
when it is heated from 25°C to 50°C? Explain.

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