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减压过滤后为什么要洗涤晶体

更新时间: 2020-11-08 00:00:00     

减压过滤后之所以要洗涤晶体是因为要避免晶体再次溶解,滤纸不可损坏。重结晶要求被提纯物在溶剂中的溶解度随温度变化要大,温度较高时溶解较好。洗涤晶体时,蒸馏水温度低,晶体溶解度差,不会溶解,但可定会有一点点损失

关键词: 减压 过滤 为什么 洗涤 晶体

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