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一、[实验3—1]炭对二氧化氮气体的吸附作用课本上,此实验是利用观察颜色的变化来说明炭对二氧化氮有吸附作用的。如对此实验稍加改进则更能说明问题。作法是: 把[实验3—1]中的集气瓶换成细口瓶,配上橡皮塞,再配上U型玻璃导管。演示时,把木炭(或活性炭)装入盛有二氧化氨气的细口瓶中,立即塞紧橡皮塞,玻璃导管的另一端插入盛有适量水的烧杯中。这时可见烧杯中的水顺着导管向细口瓶中流去。另外,瓶中气体的颜色有所变浅。两种现象充分证明木炭(或活性炭)对二氧化氮具有吸附作用。装置如下图所示。
I. [Experiment 3-1] Adsorption of Carbon Dioxide on Nitrogen Dioxide Gases In the textbook, this experiment used the observed changes in color to indicate that carbon has an adsorption effect on nitrogen dioxide. A slight improvement in this experiment will better illustrate the problem. The method is: Replace the gas cylinder in [Experiment 3-1] with a fine bottle, and attach a rubber stopper and then add a U-shaped glass conduit. In the demonstration, charcoal (or activated charcoal) was placed in a jar containing ammonia gas and the stopper was immediately plugged. The other end of the glass conduit was inserted into a beaker containing the appropriate amount of water. At this time, it can be seen that the water in the beaker flows down the pipe to the fine bottle. In addition, the color of the gas in the bottle has become lighter. Two phenomena fully demonstrate that charcoal (or activated carbon) has an adsorption effect on nitrogen dioxide. The device is shown in the figure below.