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前言化学是一门以实验为基础的科学,它的发展进程是与生产实践和科学实验分不开的。因此,化学实验在中学化学教学中占有十分重要的地位。为加速实现四个现代化,随着科学的发展,中学化学的教学内容和实验方法都有很大的更新。新大纲规定的化学实验比旧大纲增加了约30%,而且明确指出“加强实验教学是提高化学质量的重要一环”。特别在初中化学
Foreword Chemistry is an experiment-based science, its development process is inseparable from the production practice and scientific experiment. Therefore, chemical experiments occupy a very important position in chemistry teaching in middle schools. In order to speed up the realization of the four modernizations, with the development of science, the teaching contents and experimental methods of secondary chemistry have been greatly updated. The new outline of the chemical experiment than the old outline increased by about 30%, but also clearly pointed out that “to strengthen experimental teaching is to improve the chemical quality is an important part.” Especially in junior high school chemistry