一、复习要求掌握实验室制取Ｏ2 、Ｈ2 、ＣＯ2 的反应原理、仪器装置、操作步骤、收集方法及验满或验纯方法 .二、主要内容提示(一 )实验室制取气体的思路1 制取气体的思路制取气体的思路为 :①化学反应原理 ;②反应装置和收集方法 ;③检验气体方法 ;④实验步骤 ;⑤注意事项 . I. Review It is required to master the reaction principles, instrumentation, operation procedures, collection methods, and full or pure methods for the preparation of O2, H2, and CO2 in the laboratory. II. Description of the main contents (1) Ideas for preparing gas from the laboratory 1 The idea of ​​preparing gas to obtain gas is: 1 chemical reaction principle; 2 reaction device and collection method; 3 test gas method; 4 experimental steps;