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【单选题】
常温下甲为pH=2的醋酸溶液，pH=2的醋酸和盐酸的混合溶液，下列说法正确的是 （ ）A.
甲溶液中c（CH 3 COO － ）一定大于乙溶液中c（CH 3 COO － ）
B.
甲、乙等体积混合后pH大于2
C.
乙溶液离子浓度大小关系为：c（Cl － ）＞c（CH 3 COO － ）＞ c（H + ）＞c（OH － ）
D.
加入相同浓度的NaOH溶液至中性，甲乙两溶液消耗NaOH溶液的体积相同
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