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氧气的制取是初中化学重要的基础知识之一.正确解答这类题的前提是:(1)要掌握与氧气制取相关的概念;(2)能根据制备原理、药品状态、制取条件、氧气性质掌握氧气制取和收集的装置(包括仪器的使用、气密性的检查、药品的添加等),重点是掌握实验室制取和收集氧气的注意事项;(3)能根据反应原理、相关的概念和定律正确地进行计算和分析推理.现对近年中考制氧的典型题进行归类导析.
The preparation of oxygen is one of the basic basic knowledge of junior high school chemistry. The premise of correctly answering such questions is: (1) To grasp the concept related to oxygen production; (2) According to the preparation principle, drug status, preparation conditions , Oxygen properties to master the preparation and collection of oxygen devices (including the use of equipment, airtight inspections, drug additions, etc.), the focus is to grasp the laboratory preparation and collection of oxygen precautions; (3) according to the principle of reaction The relevant concepts and laws are correctly calculated and analyzed. Now, the typical questions of oxygen production in recent years have been classified and analyzed.