高中化学课本(必修本)第二册P152学生分组实验乙炔的制取和性质。实验操作分两步完成,本人认为此操作步骤存在以下缺点: 1.在实验步骤①中要求学生按教材中所列装置制取乙炔气体,然后验纯点燃。根据乙炔气体的水溶性和密度的大小,乙炔较理想的收集方法是用排水集气法。而此装置不便于乙炔的收集验纯。 High School Chemistry Textbook (required), Part Two, P152 Student Grouping Experimental Acetylene Preparation and Nature. The experimental operation was completed in two steps. I think this operation step has the following shortcomings: 1. In the first step of the experiment, students are required to make the acetylene gas according to the device listed in the teaching material, and then test the ignition. According to the water solubility and density of acetylene gas, the ideal collection method for acetylene is the drainage and gas collection method. This device does not facilitate the collection and verification of acetylene.