发布日期:2010-06-28 05:02:11
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除去下列物质中的少量杂质(括号内是杂质),所用试剂及方法均正确的是( ) A.铜粉(碳粉)——在空气中灼烧 B.氯化亚铁溶液(氯化铜)——加过量的铁粉、过滤 C.氢氧化钠(碳酸钠)——加适量的稀盐酸、蒸发 D.一氧化碳(二氧化碳)——通过足量的氢氧化钠溶液、干燥 |