試題詳解

4. For two monoprotic acids (HA, HB) and their conjugate bases (A^- , B^- ), the following relations are known: HA + B- A^- + HB, K ＞ 1 and pK_b(A^- ) ＜ 7.0. Which of the following order of K’s is correct?
(A) K_b(B^- ) ＞ K_a(HB) ＞ K_a(HA) ＞ K_b(A^- )
(B) K_b(A^- ) ＞ Kb(B^- ) ＞ K_a(HA) ＞ K_a(HB)
(C) K_b(B^- ) ＞ K_b(A^- ) ＞ K_a(HA) ＞ K_a(HB)
(D) K_b(B^- ) ＞ K_a(HA) ＞ K_b(A^- ) ＞ K_a(HB)