Which of the following best defines the term “buffer capacity”?
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Which of the following best defines the term “buffer capacity”?
(a) The numerical difference between the pH of a buffer and the pKa of its weak-acid component.
(b) The ability of a solution to maintain a pH of exactly 7.00 regardless of acid or base added.
(c) The extent to which the pH of a buffer resists change when small amounts of strong acid or base are added, expressed as the amount of acid or base the buffer can neutralize before a significant pH shift occurs.
(d) The total concentration of weak acid and conjugate base present in the buffer solution.