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在进行化学复习时,不少学生会感到困惑,因概念多,物质杂,难记忆,易遗忘,之所以产生上述现象,笔者认为主要是教师的教学方法不当,学生的学习效率不高,要提高复习效率,可以采用下述方法:一、理解记忆,识记知识对于基本概念、基本理论、化学用语、物质通性及某些物质的特性,一定要抓住其中的关键词句,在理解的基础上记忆,做到记得牢、用得着、写得准。例如要记住溶解度的概念,必须抓住四点:①一定温度;②100克溶剂;③达到溶解平衡(或达到饱和状态);④溶质质量克数。这四点可以这样理解记住:物质的溶解度随温度不同而变化,故温度要一定;在不同量的溶剂里可溶解不同量的溶质,故规定是100克溶剂;未达到饱
In the course of chemical review, many students feel confused because of many concepts, miscellaneous materials, difficulties in remembering, and being forgotten. The above phenomenon is caused by the author’s view that the teaching methods of teachers are not proper, and students’ learning efficiency is not high. To review the efficiency, the following methods can be used: First, understand memory, and memorize knowledge. For the basic concepts, basic theories, chemical terms, material commonalities, and the characteristics of certain substances, we must seize the key words in the basic understanding. Memorize it, remember it, use it, and write it correctly. For example, to keep in mind the concept of solubility, we must seize four points: 1 certain temperature; 2100 g of solvent; 3 reach equilibrium (or reach saturation); 4 solute mass. These four points can be understood in this way to remember: The solubility of substances varies with temperature, so the temperature must be certain; in different amounts of solvent can dissolve different amounts of solute, so the provisions are 100 grams of solvent; not reached full