試題詳解

4. Buffers have all of the following characteristics EXCEPT:
(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 two pKa values.
(E)Buffer where the amounts of conjugate base are nearly equivalent to the amounts of weak acid.