侯英超 | 发布日期:2010-04-29 19:16:41
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下列除去杂质的方法中,错误的是 ( ) 物质 杂质 除杂质的方法 A.CaCl2溶液 HCl 过量CaCO3、过滤 B.NaOH溶液 Ca(OH)2 过量Na2CO3溶液、过滤 C.FeCl3溶液 CuCl2 过量铁粉、过滤 D.CH4 H2O 通过盛浓硫酸的洗气瓶 |