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除杂提纯是物质分离与提纯的一种类型,也是近几年中考常见题型之一.从物理方法和化学方法两个角度,通过典型例题分析,归纳总结具体的除杂方法,让学生能针对不同的题型,快速找出行之有效的除杂措施.初中教材关于物质的分离与提纯,主要介绍两种类型:一是除杂提纯,即把杂质除去,或使杂质转化为要提纯的物质;二是分离提纯,即把混合物中的不同物质分离开来,再分别进
The impurity purification is a type of material separation and purification, and is also one of the common questions in the middle school entrance exams in recent years. From the two perspectives of physical methods and chemical methods, through the analysis of typical example questions, the specific impurity removal methods are summarized to enable students to For different types of questions, quickly find effective removal measures. The junior high school textbooks on the separation and purification of substances, mainly introduces two types: First, impurity purification, that is to remove impurities, or to convert impurities to be purified The second substance is separation and purification, that is, separation of different substances in the mixture and then separate