下列实验方案设计合理的是 A.用盐酸和硝酸银溶液来检验蒸馏水中

下列实验方案设计合理的是

A.用盐酸和硝酸银溶液来检验蒸馏水中是否存在氯离子

B.用饱和Na2CO溶液除去CO2中的HCl气体

C.制取Fe(OH)2时需创造无Fe3和无O2的环境

D.用氨水除去镁粉中的少量铝粉

答案

C

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