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高中化学选修5,实验室乙炔的制取和性质的实验中,由于碳化钙跟水反应比较剧烈,产生大量泡沫,不易控制反应速率,且所制得的气体中因含有杂质而有特殊难闻的臭味。用课本的操作方法,学生实验操作时,由于上述原因,容易出现措手不及的情况,难避免泡沫从导管中喷出,生产的气流也不平稳,因而影响实验现象。本实验经过改进能达到较为理想的效果。
High school chemistry elective 5, acetylene laboratory preparation and nature of the experiment, due to the more intense reaction of calcium carbide with water, resulting in a lot of foam, not easy to control the reaction rate, and the resulting gas due to impurities and have a particular unpleasant smell The smell. With the operation of textbooks, students experimental operation, due to the above reasons, prone to unexpected situations, it is difficult to avoid the bubble ejected from the catheter, the production of air flow is not stable, thus affecting the experimental phenomenon. The experiment can be improved to achieve better results.