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以辩证唯维主义观点来提高中学化学教学的质量,这是一个重要问题。下面仅以它对化学教学的作用,分述于下: 1.有助于加强基础知识的教学: 大家知道,只有观点正确,掌握概念才能清楚,例子是不胜枚举的。锌能与稀酸作用,铜不能,为什么?金属的活泼性有不同。锌和铜碰到加热的浓硫酸都能反应,为什么?不是金属的活动性起主要作用了,是浓硫酸的氧化性起了决定作用。碳在氧气里燃烧,充分时生成二氧化碳,不充分时生成一氧化碳,为什么?物质之间能否发生反应,这是由物质的本性决定的,但条件不同时,物质的本性的表现形式可以不同。
To improve the quality of chemistry teaching in middle schools in terms of dialectical ordimensionalism, this is an important issue. The following is just a description of the role of chemistry teaching in the following: 1. It helps to strengthen the teaching of basic knowledge: As we all know, only the correct viewpoint can be grasped and the concepts can be clearly understood. The examples are numerous. Zinc can react with dilute acids, but copper cannot, why? Metals have different liveliness. Both zinc and copper can react to heated concentrated sulfuric acid. Why? Not the metal’s mobility plays a major role. It is the oxidizing nature of concentrated sulfuric acid that plays a decisive role. Carbon is combusted in oxygen, carbon dioxide is produced when sufficient, and carbon monoxide is formed when it is insufficient. Why? The reaction between substances can be determined by the nature of the material. However, when the conditions are different, the nature of the material may be expressed in different ways.