化学是一门以实验为基础的自然科学。实验能为化学学习提供必要的感性材料,有利于学生理解化学概念和原理,形成科学的思想和观念;能为学生提供练习和实践的机会,有助于培养学生的观察能力和思维能力,提高实验操作技能;能激发学生学习化学的兴趣,增强学习动机,调动其学习积极性; Chemistry is an experiment-based science. Experiments can provide the necessary perceptual material for chemistry study, which helps students to understand the concepts and principles of chemistry and form scientific ideas and concepts. It can provide students with opportunities for practice and practice, and help students to improve their ability of observation and thinking Experimental skills; can stimulate students interest in learning chemistry, enhance learning motivation, to mobilize their enthusiasm for learning;