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一、碘化锌的合成和分解1.特点:这是一个具有较好教学效果的综合性实验。通过锌粉和固体碘在催化剂——水的催化下先合成碘化锌。然后电解制得的碘化锌溶液又重新得到锌和碘。这个实验贯穿了化合、催化、升华和电解等基本原理,既有启发性、又有趣味性。该实验使用药品、器材很普通,现象明显,实验时间也很短(全过程只需要几分钟)。实验既可在中学化学的教学中在复习课时配合有关基础理论或元素部份进行演示,也可以作为训练学生综合运用所学知识的课外实验或课堂分组实验。
First, the synthesis and decomposition of zinc iodide 1. Features: This is a comprehensive experiment with good teaching results. Zinc iodide was first synthesized by zinc powder and solid iodine under catalyst-water catalysis. The zinc iodide solution obtained from the electrolysis again regains zinc and iodine. This experiment runs through the basic principles of compounding, catalysis, sublimation and electrolysis, both enlightening and interesting. The experiment using drugs, equipment is very common, the phenomenon is obvious, the experimental time is also very short (the whole process only takes a few minutes). Experiments can be used in middle school chemistry teaching in the review of the course with the relevant basic theory or elements of the part of the demonstration can also be used as a training student integrated knowledge of the extracurricular experiments or classroom grouping experiments.