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1.将配有双孔胶塞的烧瓶(或大试管)装入适量浓HNO_3,固定在铁架台上。胶塞上的双孔一插入玻璃导管,一插入盘有罗旋的铜丝。 2.制取气体时,打开弹簧夹,将铜丝向下推进,与浓HNO_3接触,反应即开始,有NO_2气体生成。可用集气瓶直接收集。集气瓶充满后,将铜丝向上拉起,脱离浓HN0_3,反应即停止。同时将弹簧夹夹好,防止有少量N0_2气体逸出。
1. Place a suitable amount of concentrated HNO 3 in a flask (or large tube) equipped with a double bore rubber stopper and fasten it on a metal stand. Two holes in the rubber plug were inserted into the glass tube, and a copper wire was inserted into the disk. 2. When making the gas, open the spring clip and push the copper wire down. Contact with concentrated HNO 3 . The reaction starts and NO 2 gas is generated. Gas cylinders can be collected directly. After the collection cylinder is full, pull the copper wire up and out of the concentrated HN0_3, the reaction stops. At the same time, the spring clips are clamped to prevent a small amount of N0_2 gas from escaping.