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初中化学实验,不仅可以激发初中生学习化学的兴趣,而且也是初学者形成化学基本概念的有效载体,同时又有利于学生巩固化学知识、形成基本的实验技能。本文就以“酒精灯火焰温度的测定”和“中和反应的确定与观察”这两个实例,谈一谈如何改进初中化学实验的教学方法。一、酒精灯火焰温度的测定方法 (分组实验)对于酒精灯火焰温度的测定实验,教学中通常采用传统的实验方法。学生一般只能从感性上去判断和观察实验的现象,从感性上总结出实验结果,但是却不能精准地获得
Junior high school chemistry experiment, not only can stimulate junior high school students to learn chemistry, but also beginners to form a basic concept of chemistry, an effective carrier, but also help students consolidate the chemical knowledge, the formation of basic experimental skills. In this paper, we will talk about how to improve the teaching methods of chemistry experiment in junior high schools based on the two examples of “determination of flame temperature of alcohol lamp” and “determination and observation of neutralization reaction”. First, the alcohol lamp flame temperature measurement method (packet experiment) For the alcohol lamp flame temperature measurement experiment, teaching is usually used in traditional experimental methods. Students generally can only judge and observe the phenomenon of the experiment from the perceptual, summarize the experimental results from the perceptual, but can not accurately obtain