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如何检验乙醇中是否有水

更新时间: 2020-10-31 00:00:00     

检验乙醇中是否有水分的方法是:用滴管吸取少量乙醇滴到白色无水硫酸铜固体上,变蓝(生成胆矾蓝色)表示有水存在。反应式:CuSO4+5H2O=CuSO4·5H2O(蓝色)。若还是白色,则不含水。如果需要定量检验,使用卡尔费休法滴定。

关键词: 如何 检验 乙醇 是否

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