試題詳解

76. For the stepwise dissociation of aqueous H₃P0₄, which of the following is not a conjugate acid-base pair? _
(A)HPO₄ ^2-andPO₄^3-
(B) H₃PO₄, and H₂PO₄^- 
(C)H2P0₄^- andHP0₄ ^2-
(D) H₂PO4^- and Po4^3-
(E) H₃O⁺ and H₂0