以实验为基础的理化学科中，演示实验由于具有直观性、示范性、启发性等主要特点，在课堂教学中能激发学生的学习兴趣，验证、巩固、加深理解书本与课堂上所学的理论知识、培养学生的观察、分析能力，并使学生初步具备了动手能力．所以演示实验越来越受到广大化学教师的普遍重? In experiments based on the Department of Physical Chemistry, demonstration experiments are intuitionistic, exemplary, and inspiring. They can stimulate students’ interest in learning in classroom teaching, and they can validate, consolidate, and deepen the understanding of books and theories learned in the classroom. Knowledge, training students’ observation and analysis skills, and make students have initial practical ability. So the demonstration experiment is increasingly popular with the majority of chemistry teachers.