为使Na2S溶液中[Na+]/[S2-]的值减小,可加入的物质是(    ) A. 盐

为使Na2S溶液中[Na+]/[S2-]的值减小,可加入的物质是(    )

A. 盐酸                              B.适量的NaOH溶液

C.适量的KOH溶液               D.适量KHS溶液

答案

CD

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