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一、实验步骤1.按附图安装好实验装置。在实验开始前,先在大试管中用排水法收集好一试管氧气,并用橡皮塞塞紧试管口备用。2.在平底烧瓶中收集一瓶 NO_2气体并用橡皮塞塞紧瓶口。这时可以观察到烧瓶内充满红棕色的 NO_2气体。此时气球处于自然松弛状态。3.用注射器将水注入平底烧瓶内,轻轻摇动平底烧瓶,烧瓶内的红棕色消失,NO_2气体变为 NO 气体。
First, the experimental steps 1. According to the drawings to install the experimental device. Before the start of the experiment, collect a test tube of oxygen by a drainage method in a large test tube and use a rubber stopper to tightly test the nozzle. 2. Collect a bottle of NO 2 gas in a flat-bottomed flask and tighten the finish with a rubber stopper. At this time, it is observed that the flask is filled with red-brown NO 2 gas. At this point the balloon is in a state of natural relaxation. 3. Using a syringe, pour water into a flat-bottomed flask and gently shake the flasks until the reddish brown color in the flask disappears and the NO 2 gas becomes NO gas.