在实验室中制取甲烷,过去学生做分组实验时,每次总要破裂许多只试管,原因是一向都是取无水醋酸钠与碱石灰混合后加入试管中,而且混和物是一次加入的,这样的结果,往往仍旧不易很快地达到反应所必须的温度,并且试管壁或多或少受到苛性钠的侵蚀,效果不好,而试管却屡屡地容易破裂。这一次我们的实验采用了下面的办法,甲烷出来很多很快,点燃时火焰很高,并且试管一只也没有破损,现将操作过程介绍如下以供参考: 在试管中先加无水醋酸钠,加热使其熔融,俟熔融后,再加入适量的碱石灰,然后继续加熟,这样,碱石灰直接接触熔融的醋酸钠,一方面反应立即发生而且容 Methane is produced in the laboratory. In the past, when the students did the grouping experiment, many test tubes were always cracked because the anhydrous sodium acetate and soda lime were always mixed in the test tube and the mixture was added once , The result is often still not easy to quickly reach the temperature necessary for the reaction, and the test tube wall more or less by caustic soda erosion, the effect is not good, but the test tube is often easy to rupture. This time our experiment adopted the following approach, methane out a lot faster, when the flame is high, and a test tube is not damaged, the operation is now introduced as follows for reference: first added in the test tube anhydrous sodium acetate , Heated to melt, 俟 melt, then add the right amount of soda lime, and then continue to add cooked, so soda lime direct contact with molten sodium acetate, on the one hand, the reaction occurred immediately and