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根据初中化学教学参考书介绍,制一氧化碳要取250ml 烧瓶一个配双孔塞,附分液漏斗和短弯导管各一。然后用浓硫酸与甲酸加热80℃至90℃制一氧化碳。此实验规定浓硫酸用40至50ml,甲酸5至10ml。我们通过多年教学实践总结认为:1.分液漏斗、烧瓶容器过大,盛装浓硫酸和甲酸的量过多,浪费药品较严重。2.因为烧瓶容器较大,加热反应排空气的时间不易掌握。若空气未排完收集的一氧化碳点燃易发生爆炸,若排空气的时间过长,又怕大量的一氧化碳逸出,污染空气,影响教师的身体键康。3.一般农村中学实验条件较差,分液漏斗没有,一氧化碳制取就遇到困难。针
According to the junior high school chemistry teaching reference book, the carbon monoxide is prepared by taking a double-hole plug with a 250-ml flask and attaching a separatory funnel and a short-bending catheter. Then, concentrated carbonic acid and formic acid were heated to 80°C to 90°C to produce carbon monoxide. This experiment specifies 40 to 50 ml of concentrated sulfuric acid and 5 to 10 ml of formic acid. We have concluded through many years of teaching practice that: 1. Separating funnels and flasks are too large, too much concentrated sulfuric acid and formic acid are contained, and wasteful drugs are more serious. 2. Because of the large volume of the flask, it is not easy to grasp the time required for the reaction to vent the air. If the carbon monoxide that is not exhausted is ignited and the air is prone to explosion, if the air is exhausted for too long, it is feared that a large amount of carbon monoxide will escape and pollute the air, affecting the physical health of the teacher. 3. The experimental conditions in rural middle schools are generally poor. There is no separation funnel, and carbon monoxide is difficult to obtain. needle