25℃时,0.1 mol/L 的CH3COOH溶液 pH =3,0.1 mol/L的HCN溶液pH=4。下列说法正确的是
A.CH3COOH与HCN均为弱酸,酸性:HCN > CH3COOH |
B.25℃时,水电离出来的c(H+)均为 10-11mol/L的两种酸,酸的浓度:HCN > CH3COOH |
C.25℃时,浓度均为0.1 mol/L 的CH3COONa和NaCN溶液中,pH大小:CH3COONa >NaCN |
D.25℃时,pH均为3的CH3COOH与HCN溶液各100ml与等浓度的NaOH溶液反应,消耗NaOH溶液体积:CH3COOH >HCN |