試題詳解

67. The sodium salt, NaA, of a weak acid is dissolved in water; no other substance is added. Which of the statements (to a close approximation) is true?
(A) [H⁺ ] = [A^- ]
(B) [H⁺ ] = [OH^- ]
(C) [A^- ] = [OH^- ]
(D) [HA] = [OH^- ]
(E) none of these