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近年来,不少书刊都在介绍中学化学计算的一题多解,这对帮助教师备课,培养学生的能力,无疑是有益的,不足之处是多解的形式介绍的多,而多解的规律性很少触及。一道化学计算题,有多少种合理解答方式?对某一学生而言,他只能根据自己最熟悉的化学概念和解题技巧,找出一种合理的解题方式就行了。无须强求采用多种解法,不同的学生由于各人对各种化学概念掌握的牢固程度不同,思维方式不同,故对同一问题有可能采用不同的表达方式,因而导致对同一试题而列出不同形式的代数方程式。如果所列的代数方
In recent years, many books and periodicals have introduced multiple solutions to the chemistry calculations in middle schools. This is helpful for preparing teachers and preparing students’ abilities. It is undoubtedly beneficial. The inadequacies are many forms of explanation and many solutions. Regularity is rarely touched. How many kinds of reasonable solutions can be used in a chemistry calculation? For a student, he can only find a reasonable solution based on his most familiar chemistry concepts and problem-solving skills. There is no need to insist on the use of multiple solutions. Different students have different ways of thinking about the various types of chemical concepts, and different ways of thinking. Therefore, it is possible to use different expressions for the same problem, resulting in different forms for the same question. Algebraic equations. If listed algebraic parties