常温下,下列各溶液的叙述不正确的是( )
A.pH="7" 的醋酸钠和醋酸混合液中:c(Na+)= c(CH3COO—) |
B.0.1 mol/L的醋酸的pH="a" , 0.01mol/L的醋酸的pH="b," 则a+1 > b |
C.0.1 mol/L的醋酸钠溶液20mL与0.1mol/L的盐酸10mL混合后溶液显酸性: 2c(H+) + c(CH3COOH) = c(CH3COO—) + 2c (OH—) |
D.已知酸性HF > CH3COOH, pH相等的NaF与CH3COOK溶液中, |
[ c(Na+ )-c(F— )]<[c(K+)-c(CH3COO— )]