实验步骤ａ．装配仪器（如图１所示）。图１苯的溴代反应实验ｂ．向分液漏斗里注入约５ｍＬ的苯，用一支长细滴管吸取液溴约３ｍＬ。为了减少溴的挥发扩散，将滴管下端插入到苯的液面以下缓慢地放出，并吸取分液漏斗内的苯液清洗滴管。用完后，滴管应浸入氢氧化钠溶液中清... Experimental steps a. Assembly equipment (as shown in Figure 1). Figure 1. Bromination reaction of benzene. b. About 5 mL of benzene was injected into the separatory funnel, and about 3 mL of liquid bromine was aspirated with a long thin pipette. In order to reduce the volatilization and diffusion of bromine, the lower end of the dropper was slowly inserted under the liquid surface of benzene, and the benzene liquid in the separatory funnel was sucked to clean the dropper. After use, the dropper should be immersed in sodium hydroxide solution.