Question

crazylobster

高中化學忘光光 想請教大能來解

HC104
選階題
) 17. 一溶液中CN 及CH,COO 的莫耳濃度相同,加過氯酸於此溶液中直到H*莫
耳濃度等於104M時,下列各項關係哪些正確?(HCNK=4×10-10,
CH3COOH K₁ = 1.8×105)
(A) [CN ]=[CH3COO¯]
(B) [CH3COOH]> [HCN]
(C) [CH,COO ] < [CN]
10
1= √ 4x100x ka
10th = 4 × 10 10 xko
$10²
80054102
=15
(D)
[CH COO
[CN]
[CH3COOH]
[HCN]
(E)
[CH3COO] [CN]
+
= 0.180
[CH3COOH] [HCN]
104
=