在碱性溶液中一定能大量共存的离子组是 A. Na+、K+、Cl-、SO42- 

在碱性溶液中一定能大量共存的离子组是

A. NaKClSO42          B. Cu2Fe2NO3SO42

C. NaMg2+ClClO         D. KNH4ClSO42

答案

A

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