实验室制取氧气的实验是初中化学里一个重要实验。做好这个实验，既可巩固已学过的基本操作知识，又可为今后气体制取知识的学习奠定坚实的基础。欲掌握实验室制取氧气的方法，应抓住以下四个方面：一抓反应原理1．所用药品为氯酸钾与二氧化锰或高锰酸钾。氯酸钾是白色固体，二 The experiment of making oxygen in the laboratory is an important experiment in junior high school chemistry. Doing this experiment can not only consolidate the basic operational knowledge that has been learned, but also lay a solid foundation for the future learning of gas preparation. To master the method of preparing oxygen in the laboratory, we should seize the following four aspects: First, grasp the reaction principle. The drugs used were potassium chlorate and manganese dioxide or potassium permanganate. Potassium chlorate is a white solid, two