化学是以实验为基础的学科。由于平时学生对化学实验基本操作和基本技能的训练不够,有些学生动手之前也没有好好想一想,因而做化学实验时,就容易犯这样那样的错误。这些错误虽然简单,但易被人忽视,又对实验有相当大的影响。笔者做过一段时间的实验员,现罗列一些学生常见的错误,以资参考。1.加热固体物质用排水法收集气体时,实验完毕,先移酒精灯,后把导管从水中取出,使水倒流,试管破裂。2.把试管里的物质加热,没有将试管夹夹在离管口 Chemistry is based on experimental discipline. Due to the fact that students usually do not have enough training in the basic operation of chemical experiments and basic skills, some students do not think well before starting a hands-on experiment, so it is easy to make such a mistake when doing chemical experiments. Although these errors are simple, they are easily overlooked and have a considerable impact on the experiment. I have done some time as a laboratory technician, is now listed some of the common mistakes of students to reference. 1. Heated solid material Drainage method to collect gas, the experiment is completed, the first shift alcohol lamp, the catheter removed from the water, the water back, the test tube rupture. 2. The test tube in the heating material, not caught in the tube test tube from the nozzle