45.tWhich solution has the highest pH?
(A)t0.1 M KCN, Ka of HCN = 4.0 x I0-10
(B)t0.1 M NaHS, Kb of HS- = 1.8 x 10-7
(C)t0.1 M NaOAc, Ka of HOAc = 1.8✖10-5
(D)t0.1 M NaClO, Ka of HClO = 3.2 x 10-8
(E)t0.1 M NH4NO3, Kb of NH3 = 1.8 x I0-5
答案：A
統計：A:4,B:0,C:3,D:0,E:0
難度：計算中