推荐回答(5个)
可以利用酒精和水沸点不同的特点进行分馏.对混合物加热,并使其温度保持略高于78℃,由于酒精的沸点是78℃,所以酒精不断变成气态由混合液中逸出,把这种酒精蒸气收集起来再冷凝,就可使水和酒精分开.
如:先架上一个大锅 加上水 煮上
咋用一个小锅把你的那些东西放到里面 再把小锅放进大锅里面(别让大锅里面的水进去了)
由于小锅受到的是大锅里面的水的加热 所以温度不会超过100摄氏度 于是效果里面的水“不会”沸腾 剩下的酒精全部气化(因为酒精沸点比水低)
然后把这些气态酒精收集起来 液化 就全部是酒精了 而水还在小锅里
有点复杂
先架上一个大锅 加上水 煮上
咋用一个小锅把你的那些东西放到里面 再把小锅放进大锅里面(别让大锅里面的水进去了)
由于小锅受到的是大锅里面的水的加热 所以温度不会超过100摄氏度 于是效果里面的水“不会”沸腾 剩下的酒精全部气化(因为酒精沸点比水低)
然后把这些气态酒精收集起来 液化 就全部是酒精了 而水还在小锅里
另外!没错!按照我的方法水和酒精都没有损失!
是区分开还是分离开
区分的话闻一闻最简单,或者用密度法
如果是分离
首先,蒸馏的方法是行不通的。因为水和乙醇会因为氢键的影响形成共沸。
使用萃取的方法可以分离。另外可以采用色谱法。不过水和酒精都是常用的溶剂,没有必要费这么大劲吧
搞一些吸水的化学物质,比如无水硫酸铜,放到酒精中,即可把其中的水洗走。然后在过滤就行了。
把混合的液体加热``用小管子连接两瓶子``观察液体温度的变化``当温度达到了酒精的沸点后将不再升高``继续加热``当温度继续升高时说明酒精已经全部出来了`
说得太乱``希望你可以看懂````````
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