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(一)初中化学课本(1955年4月出版,下同)第41页,图17,燃磷前可在燃烧匙内放少许细沙,细砂上再放磷,以免燃烧匙损坏。 (二)第44页,用氯酸钾制氧气,要说明二氧化锰的催化作用的实验,可参考高中化学(1955年4月出版)第一册125页及180页中有关的实验,选作演示之用。 (三)教师演示44页图19制氧时,除用排气法收集氧气外,还可用排水取气法收集一瓶,给学生说明注意事项,为学生实验(第166页实验5)准备条件。 (四)如教师用氯酸钾及二氧化锰制取氧气演
(A) junior high school chemistry textbook (April 1955 publication, the same below) Page 41, Figure 17, before burning phosphorus can put a little sand in the combustion spoon, and then on the fine sand phosphorus, so as not to damage the burning spoon. (B), page 44, using potassium chlorate to make oxygen, to illustrate the catalysis of manganese dioxide experiment, refer to the high school chemistry (published in April 1955) the first one on page 125 and 180 in the relevant experiment, selected as a demo Use. (C) Teacher Presentation Page 44 Figure 19 During oxygenation, in addition to collecting oxygen by the exhaust method, a bottle can also be collected by the drainage and gas extraction method to give students a note on the preparation conditions for the student experiment (Experiment 5 on page 166) . (D) If teachers use potassium chlorate and manganese dioxide to make oxygen play