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为什么要验纯
更新时间: 2020-10-09 00:00:00  

验纯一般是确保化学实验的安全。

验纯就是化学中检验所的产物的纯度。有些比例不正确混合气体在实验时可能会爆炸或出现危险。例如,点燃氢气前要验纯,氢气是一种可燃性气体,它的爆炸极限是在与氧气混合百分之四到百分之七十四点二时,如果不验纯,就不知道集气瓶内有没有掺杂的氧气,就容易爆炸。

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