实验室制取气体的思路： １．气体制取的反应原理，即在实验室条件下（如常温、加热、催化剂等），选用什么药品，通过什么反应来制取． ２．应采用的实验装置． ３．气体的检验方法，即怎样验证制得的气体就是所需的气体．一、反应原理 在实验室里，二氧化碳常用稀盐酸跟大理 The idea of ​​taking gas from the laboratory: 1. The reaction principle of the gas preparation, that is, under laboratory conditions (such as room temperature, heating, catalysts, etc.), what drugs to use, and what reaction to make. 2. The experimental device that should be used. 3. The gas test method, that is, how to verify that the gas produced is the desired gas. First, the reaction principle In the laboratory, carbon dioxide commonly used dilute hydrochloric acid with Dali