A weak acid, HA, has a pKa = 6.2.  If a solution of NaA(aq) is prepared, what does the pH of the solution need to be adjusted to in order to achieve the following ratios of deprotonated to protonated species? 1) [A-] / [HA] = 0.01 2) [A-] / [HA] = 10 3) [A-] / [HA] = 1 4) [A-] / [HA] = 106 Note: NaA is the sodium salt of , the conjugate base of HA.  Assume NaA completely dissociates in water.

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
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Problem 16.83QE
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A weak acid, HA, has a pKa = 6.2.  If a solution of NaA(aq) is prepared, what does the pH of the solution need to be adjusted to in order to achieve the following ratios of deprotonated to protonated species?

1) [A-] / [HA] = 0.01

2) [A-] / [HA] = 10

3) [A-] / [HA] = 1

4) [A-] / [HA] = 106

Note: NaA is the sodium salt of , the conjugate base of HA.  Assume NaA completely dissociates in water.

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