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实验室制备氢气常采用锌与稀硫酸在启普发生器中反应的方法.反应式为:Zn+H_2SO_4=ZnSO_4+H_2↑因此反应过的废液中含有大量硫酸锌.硫酸锌(ZnSO_4·TH_2O)又名锌矾,是无机化学实验室中常用的试剂,它是一种很重要的锌盐,在工业上常作为制备其它锌化合物的原料.如果我们把制氢废液倒掉实在可惜,笔者把制氢废液进行回收利用,从中制得了纯度达99%以上的硫酸锌晶体.可供实验室使用.这样可以利用废物,节约开支.其方法简单易行,现介绍如下:
Laboratory preparation of hydrogen is often used zinc and dilute sulfuric acid in the Kipp generator reaction method is: Zn + H_2SO_4 = ZnSO_4 + H_2 ↑ Therefore, the reaction of the waste liquid contains a lot of zinc sulfate zinc sulfate (ZnSO_4 · TH_2O ), Also known as zinc alum, is a commonly used reagent in inorganic chemical laboratory, it is a very important zinc salt, often used in the industry as a raw material for the preparation of other zinc compounds.If we waste hydrogen production is a pity, I made the hydrogen waste recycling, from which more than 99% purity of zinc sulfate crystals prepared for laboratory use. This can use waste, saving costs. The method is simple and easy, are presented below: