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知识点1:实验室制取氧气的原理[解读]在实验室里,通常采用加热分解氯酸钾或高锰酸钾的方法制取氧气。反应的文字表达式如下:(1)氯酸钾氯化钾+氧气(2)高锰酸钾锰酸钾+二氧化锰+氧气共同点:两个化学反应都是分解反应,且都需要加热。不同点:加热分解氯酸钾制氧气需要用二氧化锰作
Knowledge Point 1: Principles of Oxygen Generation in the Laboratory [Interpretation] In the laboratory, oxygen is usually produced by the thermal decomposition of potassium chlorate or potassium permanganate. The textual expression of the reaction is as follows: (1) Potassium chlorate Potassium chloride + Oxygen (2) Potassium permanganate Potassium Manganate + Manganese dioxide + Oxygen Common point: Both chemical reactions are decomposition reactions and all require heating. Different points: Heating decomposition of potassium chlorate to make oxygen needs to use manganese dioxide