初中化学要求学生能够初步设计一些简单的化学实验.通过化学实验的设计,既能加深对基本知识的理解与运用,还可以提高实验技能,并且有利于培养和提高学生的创造性思维能力,进而掌握探究问题的科学方法.化学实验设计一般包括以下几个方面:1.根据实验要求,确定实验原理;2.根据实验原理,选择所需仪器和药品;3.写出实验操作步骤和注意事项; Junior high school chemistry requires students to preliminarily design simple chemistry experiments, which not only deepen the understanding and application of basic knowledge, but also improve experimental skills, and help to cultivate and improve students’ creative thinking ability. To explore the scientific method of the problem.Chemical experiment design generally includes the following aspects: 1 according to the experimental requirements, to determine the experimental principle; 2 according to the experimental principle, select the required instruments and drugs; 3 write out the experimental procedures and precautions;