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根据听课所发现的问题,谈谈我的看法,是否正确,请大家批评指正,这些问题归纳如下: 1.给催化剂下定义时,为什么用“改变”二字而不用“加快二字,即改变化学反应速度而质量和化学性质不变的物质叫做催化剂,不能说加快反应速度,因为有的催化剂减慢化学反应速度,用”改变“化学反应速度来定义催化剂是比较全面的。 2.催化剂是否参与了化学反应?如果参与了化学反应,为什么反应前后催化剂质量和化学性质都未变呢? 一般来说,催化剂起催化作用是它和反应物发
According to the problems found in the lectures, to talk about my views, whether it is correct, please criticize and correct me. These questions are summarized as follows: 1. Why do you use the word ”change" when you define the catalyst instead of accelerating the word? The material that changes the speed of the chemical reaction but does not change the quality and chemical properties is called a catalyst. It cannot be said to speed up the reaction, because some catalysts slow down the chemical reaction rate, and the “change” of the chemical reaction rate defines the catalyst to be more comprehensive. 2. Is the catalyst involved in the chemical reaction? If it is involved in a chemical reaction, why does the catalyst quality and chemical properties remain unchanged before and after the reaction? In general, the catalyst serves as a catalyst and it reacts with the reactants.