在25℃时，将a mol/L的醋酸溶液与0.01mol/L氢氧化钠溶液等体积混合，充分反应后溶液呈中性。下列说法不正确的是 （ ）
A．a一定大于0.01
B．反应后溶液中一定有c（Na+）+c(H+)=c(OH-)+c(CH3COO-)
C．反应后溶液中一定有c(CH3COO-)+c(CH3COOH)>c(Na+)
D．反应后溶液中一定有c(Na+)>c(CH3COO-)>c(H+)=c(OH)
答案：D
溶液呈中性，c(H+)=c(OH-)，溶液中阳离子带的正电荷总数等于阴离子带的负电荷总数，所以c(Na+)=c(CH3COO-) 故 D错
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