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实验室制取氧气是中学化学教学的重要内容,通常是以二氧化锰为催化剂,采用氯酸钾加热分解的方法制取氧气。那么,二氧化锰的催化效果究竟如何?有没有比这更好的催化剂?催化剂的用量对氯酸钾分解制氧气有什么影响?本文通过探究,包括实验装置的探究,催化剂的种类、催化剂的用量等对氯酸钾分解制氧气的影响,最后对产物即氧气的纯度做了相关的分析,讨论了可能存在的副产物以及净化的方法。
Oxygen laboratory preparation is an important part of chemistry teaching in secondary schools, usually manganese dioxide as a catalyst, the use of potassium chlorate heating decomposition of oxygen. So, what is the catalytic effect of manganese dioxide? There is no better catalyst? The amount of catalyst on the decomposition of potassium chlorate make oxygen have any effect? This paper through the exploration, including the exploration of the experimental device, the type of catalyst, the amount of catalyst The influence of potassium chlorate on oxygen production was analyzed. Finally, the purity of the product, oxygen, was analyzed. The possible by-products and purification methods were discussed.