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氨气和氯化氫的喷泉实验

返回打印发布时间：2012/12/4 点击：12077

1、烧瓶干燥气密好：意思是说做喷泉实验用的烧瓶一定要干燥，而且气密性要好[联想：若烧瓶不干燥，少量的水将吸收大量的氨气或氯化氫，从而造成实验失败；若装置的气密性差，当烧瓶内在压强迅速减小时，空气将进入烧瓶，就不能形成喷泉]。

2、气体充满切记牢：意思是说一定将烧瓶中充满氨气（或氯化氫气体）。

3、擠壓膠頭要迅速：意思是說膠頭滴管的作用是把少量的水注入燒瓶中，減小燒瓶內的壓強。所以擠壓滴管的膠頭要迅速，這樣才能使燒瓶內的壓強瞬間減小，從而形成美麗的噴泉。

4、紅色噴泉多妖娆：意思是說氨氣和氯化氫的喷泉都是红色的，这是因为用氨气作喷泉实验时，水中加的是酚酞，而用氯化氫作实验时，水中加的是石蕊，故两者都形成红色的美丽的喷泉。

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