The K, of a monoprotic weak acid is 0.00344. What is the percent ionization of a 0.149 M solution of this acid?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
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The K, of a monoprotic weak acid is 0.00344. What is the percent ionization of a 0.149 M solution of this acid?
Transcribed Image Text:The K, of a monoprotic weak acid is 0.00344. What is the percent ionization of a 0.149 M solution of this acid?
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Chemistry homework question answer, step 1, image 1

Calculations:

Let the weak acid is HA. The ICE table for the dissociation of weak acid HA is shown below.

Chemistry homework question answer, step 2, image 1

The expression for the dissociation constant is shown below.

Chemistry homework question answer, step 2, image 2

Since the x is the concentration, so it cannot be negative. Therefore, the accepted value of x is 0.02085 M.

The percent ionization is calculated as shown below.

Chemistry homework question answer, step 2, image 3

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