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Propanoic acid, C₂H5COOH, is a weak acid, with Ka = 1.35 x 10-5 mol dm-³. i) Write an expression for the acid dissociation constant, Ka, of propanoic acid. ii) Calculate the hydrogen ion concentration and pH of a solution of propanoic acid containing 0.20 mol dm³. State what assumption is made in the calculation.

Propanoic acid, C₂H5COOH, is a weak acid, with Ka = 1.35 x 10-5 mol dm-³. i) Write an expression for the acid dissociation constant, Ka, of propanoic acid. ii) Calculate the hydrogen ion concentration and pH of a solution of propanoic acid containing 0.20 mol dm³. State what assumption is made in the calculation.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Propanoic acid, C₂H5COOH, is a weak acid, with Ka = 1.35 x 10-5 mol dm-³. i) Write an expression for the acid dissociation constant, Ka, of propanoic acid. ii) Calculate the hydrogen ion concentration and pH of a solution of propanoic acid containing 0.20 mol dm-³. State what assumption is made in the calculation.
Transcribed Image Text:Propanoic acid, C₂H5COOH, is a weak acid, with Ka = 1.35 x 10-5 mol dm-³. i) Write an expression for the acid dissociation constant, Ka, of propanoic acid. ii) Calculate the hydrogen ion concentration and pH of a solution of propanoic acid containing 0.20 mol dm-³. State what assumption is made in the calculation.
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