化学是一门以实验为基础的学科。实验教学可以激发学生学习化学的兴趣,帮助学生形成化学概念,获得化学知识和实验技能,培养观察和实验能力,还有助于培养实事求是、严肃认真的科学态度和科学的学习方法。它可通过教师演示实验能把书本知识由微观变为宏观,把抽象变成具体,使学生 Chemistry is an experiment-based discipline. Experimental teaching can stimulate students’ interest in learning chemistry, help students form chemical concepts, obtain chemical knowledge and experimental skills, develop observation and experimental abilities, and also help cultivate realistic, serious and scientific attitudes and scientific learning methods. It can transform the book knowledge from microscopic to macro through the teacher’s demonstration experiment, transform the abstraction into concrete, make students