论文部分内容阅读
为使学生加深对苯加成反应的认识,我们补充了苯和氯气的加成反应实验。在干燥试管里收集干燥的氯气,再向试管中加入1毫升苯,将试管塞紧直立,固定在铁架台上。点燃镁条,使镁条在距试管3—4厘米处
In order to deepen students’ understanding of the benzene addition reaction, we have supplemented the experiment of addition reaction of benzene and chlorine. The dry chlorine was collected in a dry test tube and 1 ml of benzene was added to the test tube. The test tube was plugged upright and fixed on a metal stand. Lit the magnesium bar so that the magnesium bar is 3-4 cm away from the test tube