問題詳情
9. 有一單質子弱酸（HX）的鈉鹽 NaX，已知 0.20 M 的 NaX 溶液之 pH 值為 10。現擬以HX 和 NaX 混合配製 pH 值為 6.0 的緩衝溶液，則此緩衝溶液中[X-]/[HX]的比值最接近下列哪一數字？
(A) 0.20
(B) 0.50
(C) 1.0
(D) 2.0
(E) 5.0
(A) 0.20
(B) 0.50
(C) 1.0
(D) 2.0
(E) 5.0
參考答案
答案：A
難度：困難0.333333
統計：A(11),B(3),C(1),D(5),E(2)
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