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初中化学课本第25页〔实验〕1-6、1-7、1-8〕三个实验分别做,时间长,对比性差。为了缩短实验时间,增强实验效果,拓宽学生知识面,我对实验的装置、操作作了改进和组合,并补充了以 Fe_2O_3作催化剂加速 KClO_3的分解实验。具体用品、装置、操作如下:实验用品:医用青霉素小瓶四只、卫生香一支、酒精灯四只、铁架台一个、钢筋一根(60cm 长)、细铁丝稍许、药匙、KClO_3、MnO_2、Fe_2O_3。实验装置:如下图
Junior high school chemistry text page 25 [experimental] 1-6,1-7,1-8〕 three experiments were done, a long time, poor contrast. In order to shorten the experimental time, enhance the experimental results and broaden the students' knowledge, I improved and combined the experimental apparatus and operation, and added the experiment of accelerating the decomposition of KClO_3 with Fe_2O_3 as a catalyst. Specific supplies, devices, operations are as follows: Experimental supplies: medical penicillin vials four, a health incense, alcohol lamp four, a Taiwan iron stand, a steel (60cm long), a small iron wire, medicine spoon, KClO_3, MnO2, Fe_2O_3. Experimental device: The following figure