题干

25℃的四种溶液:①pH=2的CH3COOH溶液②pH=2的HCl溶液③pH=12的氨水④pH=12的NaOH溶液,有关上述溶液的说法,正确的是( )

A:①、④溶液中水电离的c( H+):①>④

B:将②、③溶液混合后pH=7,则消耗溶液的体积:②<③

C:将①、④溶液混合后pH=8,则c(Na+)﹣c(CH3COO)=9.9×107mol•L1

D:分别向等体积的上述溶液中加入100 mL,水,溶液的pH:③>④>①>②

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C

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