6. 請將以下各為 0.10 M 的溶液由 pH 值低到高排列 :NaF,NaC2H3O2,C5H5NHCl,
KOH,HCN (HCN: Ka = 6.2 × 10–10; HF: Ka = 7.2 × 10–4
; HC2H3O2: Ka = 1.8 × 10–5
;
C5H5N: Kb =1.7 × 10–9
)
(A) C5H5NHCl, HCN, NaF, NaC2H3O2, KOH
(B) NaF, NaC2H3O2, HCN, C5H5NHCl, KOH
(C) KOH, NaC2H3O2, NaF, HCN, C5H5NHCl
(D) HCN, C5H5NHCl, NaF, NaC2H3O2, KOH