以 NaOH 水溶液將 0.10 M H2C2O4 (pKa1 : 23, pKa2 : 19 ) 水溶液之 pH 調整為 50 時，下列關係何者最適當：(A) [H2C2O4]

問題詳情

22. 以 NaOH 水溶液將 0.10 M H2C2O4 (pKa1 : 1.23, pKa2 : 4.19 ) 水溶液之 pH 調整為 4.50 時，下列關係何者最適當：
(A) [H2C2O4] = [HC2O4-]
(B) [ HC2O4-] = [C2O42-]
(C) [H2C2O4] ＞ [HC2O4-]
(D) [ HC2O_{4^{-] ＜ [C2O42-]}}

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