除去混合物中的杂质是中学化学中常见的题型,要解答好这类题,就要求我们掌握和理解各种物质的性质特征和实验方法,才能巧除混合物中的杂质。下面结合同学们在学习过程中容易出现的问题,谈谈一点看法:一、用物理方法除去杂质这是根据混合物中各物质物理性质的不同,采用溶解、过滤或加热蒸发等方法将杂质直接除去。 Removal of impurities in the mixture is a common problem in middle school chemistry. To answer this type of question, we need to grasp and understand the nature of various substances and experimental methods in order to eliminate the impurities in the mixture. Here are some of the problems that students may encounter during the learning process. Let’s talk a little bit about it. First, remove impurities using physical methods. This is based on the physical properties of the substances in the mixture. Dissolving, filtering, or heating, evaporation, etc. are used to remove impurities directly. .