18.下列何種酸是最弱的酸?
(A) HCN (pKa = 9.31)
(B)HIO3 (pKa = 0.77)
(C) HF (pKa = 3.45)
(D)CH3COOH (pKa = 4.75)
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統計: A(301), B(67), C(1), D(35), E(0) #1937416
統計: A(301), B(67), C(1), D(35), E(0) #1937416