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在化学教学中,教师应自觉地运用辩证法的观点解释基本概念和化学反应。这样可以使学生获得比较巩固的化学知识,同时受到唯物辩证法思想的教育。下面举几个例子来说明:一、用内因和外因的辩证关系讲解电离和电解在进行“电解质电离”教学时,我给学生分析了食盐、氯化氢和蔗糖在水中的电离作用。食盐、氯化氢和蔗糖本身都不导电,它们溶于水后,食盐和氯化氢的水溶液能导电,而蔗糖水仍不导电。这是为什么呢?事
In chemistry teaching, teachers should consciously use the dialectical point of view to explain the basic concepts and chemical reactions. This will enable students to gain a more solid knowledge of chemistry and be educated on materialistic dialectics. Here are a few examples to illustrate: I. Interpreting ionization and electrolysis using the dialectical relationship between internal factors and external factors In teaching “electrolyte ionization”, I analyzed the ionization of salt, hydrogen chloride, and sucrose in water. Salt, hydrogen chloride and sucrose are not electrically conductive. After they are dissolved in water, the aqueous solution of salt and hydrogen chloride can conduct electricity while sucrose water is still not conductive. Why is this?