在物化实验教材中,二元液系相图的实验,通常选用苯-乙醇体系,此实验设备简单、图形直观.但由于苯的毒性对人体和环境有害,我们用环己烷代替苯.为了减少实验过程中的加料次数,又要使实验点分布合理,我们通过多次实验,摸索出了两组试剂的加料方式:(1)在恒沸仪中注入20 ml乙醇,并依次加入环己烷1,1,2,3,5,5 ml.(2)洗净恒沸仪,用 In the materialized experiment teaching material, the experiment of binary liquid phase diagram usually selects benzene-ethanol system, the experimental equipment is simple and the figure is visual, but we use cyclohexane instead of benzene because the toxicity of benzene is harmful to the human body and the environment. Reduce the number of experiments during the addition, but also to make the distribution of the experimental points, we have many experiments, worked out two groups of reagents feeding method: (1) in a constant boiling instrument injected 20 ml of ethanol, followed by adding cyclohexane 1,1,2,3,5,5 ml. (2) Wash constant boiling instrument, used