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
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統計: 尚無統計資料
統計: 尚無統計資料