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本实验是现行高一教材中的一个重要实验,在教学过程中,我们按课本要求用多股铂丝做此实验时,一般只能看到铂丝红亮和锥形瓶口的白烟,看不到有棕色的NO_2气体出现。我们还先后用多股铜丝及铂丝与铜丝的混和物重做了上述实验,效果亦不好。当我们改用下列装置后,现象十分明显:不但能看到催化剂发红、发亮,并且能看到烧瓶里充满的NO_2棕色气体。现将改装后的实验介绍如下,请同志们指教。一、装置图:
This experiment is an important experiment in the current high one textbook. During the teaching process, when we do this experiment with multi-strand platinum wire according to the textbook requirement, we can only see the white smoke of bright red and conical bottle mouth, No brown NO 2 gas appears. We have also used multiple strands of copper wire and platinum wire and copper mixture to do the above experiment, the effect is not good. When we switched to the following device, the obvious was that not only was it possible to see the catalyst red and shiny, but also to see the flask full of NO 2 brown gas. The modified experiment is introduced below, please comrades advise. First, the installation diagram: