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在东北人民教育部编译的初中课本中,讲到化学方程式的时候,述说得很详细,尤其使学生明瞭了物质不灭定律。在开始讲方程式时,就把方程式的意义介绍出来:“化学方程式能表示出什么物质参加了化学反应和生成了什么物质。并且可以表示出这些物质的重量关系。”因此在写方程式时,要把反应前的物质与反应后的物质用等号连接起来。如:
In the junior high school textbooks compiled by the Ministry of Education of the People’s Republic of China, when it comes to the chemical equations, it is described in great detail. In particular, students are made aware of the law of material immortality. When I started to formulate the equation, I introduced the meaning of the equation: “The chemical equation shows what substance has participated in the chemical reaction and what is produced, and can express the weight relationship of these substances.” Therefore, in writing equations Before the reaction of substances and substances after the reaction with equal signs connected. Such as: