化学是一门以实验为基础的学科,化学教师在课堂中常常用演示操作的方法、再结合教学的要求进行的化学实验.它的特点是操作简单方便,现象较为明显,通过示范直观地体现了实验的各个关键点和细节.通过演示实验,可以使得学生能够比较容易地接收新的知识,还可使学生更好地了解正确使用仪器和试剂的方法和操作步骤,以便日后在独立进行学生实验时 Chemistry is an experiment-based discipline, and chemistry teachers often use demonstrative methods in classrooms, combined with the chemistry experiments required by the teaching, which are characterized by simple and convenient operation, more obvious phenomena and vivid demonstration through demonstration The experimental key points and details through the demonstration experiment, can make it easier for students to receive new knowledge, but also to enable students to better understand the correct use of instruments and reagents methods and steps for independent students in the future Experiment