为了防止 Cl_2和水、碱反应时气体外逸,对环境造成污染,我们对实验进行了如下改进。一、实验仪器医用注射器(50 mL)、矿泉水瓶(550 mL)、橡皮塞。二、操作步骤1.收集一矿泉水瓶 Cl_2,用橡皮塞塞紧。2.用注射器吸取50 mL 左右的水从橡皮塞处注入瓶中,振荡瓶子。3.用注射器吸取少量紫色石蕊溶液从橡皮塞处注入该瓶中。4.最后用注射器吸取10 mL 左右的 NaOH 溶液也从橡皮塞处注入该瓶中,振荡瓶子。三、实验现象 In order to prevent Cl 2 from reacting with water and alkalis, and to cause environmental pollution, we have made the following improvements to the experiment. First, the experimental instrument medical syringe (50 mL), mineral water bottle (550 mL), rubber stopper. Second, the operation steps 1. Collect a water bottle Cl_2, plugged with a rubber stopper. 2. Use a syringe to suck about 50 mL of water into the bottle from the rubber stopper and oscillate the bottle. 3. Use a syringe to suck a small amount of purple litmus solution into the bottle from the rubber stopper. 4. Finally, use a syringe to suck about 10 mL of NaOH solution into the bottle from the rubber stopper and oscillate the bottle. Third, the experimental phenomenon