为了除去粗盐中的Ca2+、Mg2+、SO42-及泥沙,可将粗盐溶于水,然

为了除去粗盐中的Ca2Mg2SO42及泥沙,可将粗盐溶于水,然后进行下列五项操作

过滤;加过量NaOH溶液;加适量盐酸;加过量Na2CO3溶液;加过量BaCl2溶液。下列操作顺序中最合适的是

A.  ②④⑤①③  B.  ⑤④②③①         C.  ②⑤④①③         D.  ⑤②④③①

答案

C

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