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对于刚刚接触较复杂的氧化-还原反应方程式配平的高一学牛来说,学会用电子得失法配严氧化-还原反应方程式的方法,有利于他们加深对基本概念的理解。但按课本介绍的方法进行配平,学生难免会觉得不好理解和不知系数从哪处先确定的实际问题。对此,笔者经研究得出一种设元法配平氧化-还原反应的方法,解决了这两个问题。现结合实例介绍如下:
For the newcomers who have just come into contact with the more complicated oxidation-reduction equations, learning how to use the electron gain-and-error method to equip the oxidation-reduction equations helps them deepen their understanding of the basic concepts. However, according to the method described in textbooks, the students will inevitably find it difficult to understand and do not know where the coefficient first determines the actual problem. In this regard, the author obtained a method of balancing the oxidation-reduction reaction based on the element method to solve these two problems. Now combine the examples as follows: