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化学实验是进行科学探究的根本途径,没有其他任何方式能替代它的功能。因此,我们应在精心设计探究的基础上进行实验,在实验探究中,适时地指导学生观察实验是必要的、有效的。怎样引起学生对化学实验的注意和深入思考呢?怎样去发展学生的思维能力,使学生熟练掌握实验操作要领,在探究中获得新知呢?这些问题值得我们深思。一、认识化学探究实验的反应原理内涵初中化学实验的原理主要来源于化学反应,如在实验室制备氧气,我们可以写出下列反应原理:
Chemistry experiments are the fundamental way to do scientific inquiry. There is no other way to replace its function. Therefore, we should carry out experiments on the basis of meticulous design and exploration. It is necessary and effective to guide students to observe the experiment in the process of experimental exploration. How to arouse students ’attention and thinking about chemistry experiment? How to develop students’ thinking ability, make students master the essentials of experiment operation and acquire new knowledge in the inquiry? These questions deserve our deep consideration. First, the understanding of the principle of chemical exploration experiment Response principle The principle of junior high school chemistry experiments mainly from chemical reactions, such as oxygen in the laboratory, we can write the following reaction principle: