Which of the following characteristics does NOT apply to buffers?
A)They have relatively flat titration curves at the pH(s)where they buffer.
B)They resist changes in their pH as acid or base is added.
C)They are typically composed of a weak acid and its conjugate base.
D)They buffer best for polyprotic acids half-way between the 2 pKa values.

Question

Quizplus · Accepted Answer

Buffers have relatively flat titration curves at the pH(s) where they buffer, they resist changes in their pH as acid or base is added, and are typically composed of a weak acid and its conjugate base. However, buffers do not necessarily buffer best for polyprotic acids half-way between the 2 pKa values. The optimum pH range for buffering depends on the specific buffer system being used.

Which of the Following Characteristics Does NOT Apply to Buffers