一、实验目的蒸馏、分馏实验是中学乃至大学化学实验教学的重点,而在课堂实验教学中,我们发现存在的问题有以下两点:①该实验条件较为苛刻,必须具备冷凝水源,一般教室无法满足该条件,演示实验无法在教室完成,缺水或偏远地区学校更是无法完成此类实验;②本实验耗水量大,冷凝水无法回收,造成水资源浪费。为解决这两个问题,经过反复实验论证,特将冷凝水系统做了如下改进,很好地解决了以往冷凝水无法回收利用的问题。 First, the purpose of the experiment Distillation, fractionation experiment is the focus of chemistry experiment teaching in middle school and even university, and in the experimental teaching in the classroom, we found the existence of the following two points: ① The experimental conditions are harsh, you must have condensate water, To meet the conditions, demonstration experiments can not be completed in the classroom, water or remote areas schools are unable to complete such experiments; ② The experiment water consumption, condensate can not be recycled, resulting in waste of water resources. To solve these two problems, after repeated experimental demonstration, especially the condensate system to make the following improvements, a good solution to the problem of the past condensate can not be recycled.