按照图1所示装置,可以进行NO_2的制备与性质实验。具体步骤如下:1.在具支试管内加入15 mL浓硝酸,烧杯中加入50mL水,打开活塞1,关闭活塞2和活塞3,把移动的铜丝伸入浓硝酸中,观察到有红棕色气体NO_2迅速产生,溶液变为绿色。当圆底烧瓶中收集满NO_2气体后,提起铜丝,反应停止。2.关闭活塞1,打开活塞3,用注射器向圆底烧瓶中 According to the apparatus shown in FIG. 1, NO 2 preparation and property experiments can be carried out. Specific steps are as follows: 1 in a test tube by adding 15 mL of concentrated nitric acid, beaker 50mL of water, open the piston 1, close the piston 2 and the piston 3, the moving copper wire into concentrated nitric acid observed reddish brown NO2 gas quickly produced, the solution turned green. After collecting the NO 2 gas in the round bottom flask, the copper wire was lifted and the reaction stopped. 2. Close the piston 1, open the piston 3, use a syringe to the round bottom flask