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化学计算题除按常规解法外,还可根据题目的特点,在基本概念清晰的情况下进行技巧计算。这样不但可以使解题步骤或数字运算大为简化,还可以培养学生的应变能力,求异思维能力,开拓能力,从而达到提高解题能力的目的。笔者在教学实践中对初中化学计算题解法作了归纳整理,列出以下常用的八种解法技巧,供教学时参考。一、关系式法关系式法主要用于多步反应的化学计算,根据化学反应方程式中有关物质的数量
In addition to the conventional solution, chemical calculation questions can also be calculated based on the characteristics of the subject and the basic concept is clear. This will not only simplify the problem-solving steps or numerical calculations, but also cultivate students’ resilience, ability to think differently, and develop their abilities so as to improve the ability to solve problems. In the teaching practice, the author made a summary of the junior middle school chemistry calculation method, listed the following eight commonly used solution techniques for reference when teaching. First, the relational method is mainly used for the multi-step reaction of chemical calculations, according to the number of relevant substances in the chemical reaction equation