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微型实验是以尽可能少的化学试剂来获取所需化学信息的实验方法与技术,具有实验装置简单便携、试剂用量少、安全性高、成本低等特点。笔者将人教版九年级化学教材第四单元“自然界的水”中氢气的制备及性质实验改进为微型实验,使该实验更加符合中学化学实验的要求。一、实验改进1.实验用品微型仪器一套、多用滴管、针头、锌粒、泡沫、稀硫酸、铜丝。
Micro-experiments are experimental methods and techniques for obtaining the required chemical information with as few chemical reagents as possible. The experimental devices are simple and portable, with less reagents, high safety and low cost. The author improves the preparation and characterization of hydrogen in the fourth unit of the ninth grade chemistry teaching material of People’s Education Publishing House “Water in Nature ” into a miniature experiment, making the experiment more in line with the requirements of high school chemistry experiments. First, the experimental improvements 1. Experimental supplies a set of micro-instruments, multi-dropper, needle, zinc tablets, foam, sulfuric acid, copper wire.