将混合物中的几种物质分开而分别得到较纯净的物质,这种方法叫做混合物的分离。将物质中混有的杂质除去而获得纯净的物质,叫提纯或除杂。除杂题是初中化学教学的重要部分,是每年中考的必考内容,同时也是学生感到比较棘手的一类题。它灵活多变,不仅能考查学生对化学基础知识的掌握程度,而且还能考查学生分析、综合应用知识的能力。本文从解题的角度对此类试题进行归纳,并探 The mixture of several substances separated to obtain a more pure substance, this method is called the separation of the mixture. The impurities mixed in the material removed to obtain a pure substance, called purification or impurity removal. Removal problem is an important part of junior high school chemistry teaching, is the annual exam in the required content, but also students feel more difficult type of problem. It is flexible, not only to examine the students mastery of the basics of chemistry, but also to examine student analysis, the ability to comprehensively apply knowledge. This article summarizes such questions from the perspective of problem solving and explores