Define buffer capacity and factors that influence it.

• A. Buffer capacity is the amount of acid or base that can be added to a buffer before the pH changes appreciably; it depends on buffer concentrations, ratio of conjugate base/acid, and closeness to pKa.
• B. Buffer capacity is the maximum amount of acid or base that a buffer can neutralize before the pH becomes undefined.
• C. Buffer capacity is the property that makes buffers taste salty.
• D. Buffer capacity depends only on temperature.

Answer: (A)