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苏教版化学教材中有些实验现象不明显、有些实验不绿色环保、有些实验科学性不够,本人在教学实践中对其中一些加以改进,使实验现象更明显,实验过程更科学环保,现整理、归纳如下.一、实验室制备氯气的实验化学必修1专题2在介绍氯气的生产原理时,安排用浓盐酸与二氧化锰加热反应制备氯气,用向上排空气法进行收集,用氢氧化钠溶液作尾气处理.1.教材中的装置:发生装置用固液加热型,浓盐酸置于分
Some experimental phenomena in the teaching materials of the Sujiao Edition are not obvious. Some of the experiments are not green and some are not scientific enough. Some of them are improved in the teaching practice to make the experiment more obvious. The experiment is more scientific and environmental friendly, Summarized as follows: First, the experimental laboratory preparation of chlorine chemical compulsory 1 Topic 2 In introducing the production of chlorine gas principle, arranged with concentrated hydrochloric acid and manganese dioxide heating reaction preparation of chlorine, with up air method to collect, with sodium hydroxide solution For tail gas treatment .1 teaching materials in the device: the occurrence of solid-liquid heating device type, concentrated hydrochloric acid placed in points