A friend asks the following: Consider a buffered solution made up of the weak acid HA and

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A friend asks the following: “Consider a buffered solution made up of the weak acid HA and its salt NaA. If a strong base like NaOH is added, the HA reacts with the OHto form A-. Thus the amount of acid (HA) is decreased, and the amount of base (A-) is increased. Analogously, adding HCl to the buffered solution forms more of the acid (HA) by reacting with the base (A-). Thus how can we claim that a buffered solution resists changes in the pH of the solution?” How would you explain buffering to this friend?

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Chemistry An Atoms First Approach

ISBN: 9781305079243

2nd Edition

Authors: Steven S. Zumdahl, Susan A. Zumdahl

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