一、实验装置用一段外径为1.1厘米的硬质玻璃管在喷灯上弯曲并吹制成如图1的“双球U形管”(简称U形管)。将U形管装配在双孔橡胶或软木塞上,其中一个孔安装一个小分液漏斗。实验时将塞装配在100毫升园底烧瓶上(见图2)。 First, the experimental device is made of a rigid glass tube with an outer diameter of 1.1 cm and is bent on a torch and blown to form a “double-ball U-shaped tube” (abbreviated as U-shaped tube) as shown in FIG. Fit the U-tube to a two-hole rubber or cork stopper, one of which is fitted with a small separatory funnel. The plug was fitted to a 100 ml round bottom flask during the experiment (see Figure 2).