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氧化还原反应是中学化学的核心知识之一,命题的角度主要如下:①考查价态观,判断化学反应是否为氧化还原反应,判断物质的氧化性或还原性,推断反应的产物或反应物;②考查强弱观,确定化学反应的方向和先后顺序;③考查守恒观,配平化学方程式,计算电子转移数量。本文结合命题视角,通过知识、方法与技能突破氧化还原反应三个难点。
Redox reaction is one of the core knowledge of chemistry in secondary school. Propositions are mainly as follows: (1) To examine the valence state, to determine whether the chemical reaction is a redox reaction, to judge the oxidation or reduction of the substance, and to infer the reaction product or reactant; ② examine the concept of strength, to determine the direction and sequence of chemical reactions; ③ test conservation concept, with the chemical equation, calculate the number of electron transfer. In this paper, proposition perspective, through knowledge, methods and skills to break through the three redox reaction difficulties.