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参考答案:干燥的有机层:从水相中取出溶液后,干燥剂的加入是为了除去遗留下来的水份。通常使用硫酸镁作干燥剂,因为它非常有效而且吸水很快,但是略带酸性,或者也可以用硫酸钠,只是效益比较和速度比较慢,但是中性的。这些化合物会和有机溶液中的水相结合,当它们发生反应时就会形成团块。应该有足够量的干燥剂被加入,但是只要一些固体不会形成团块,就不需要再加入更多的干燥剂。
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5参考答案:蒸馏是一个非常有用的技术,用于分离纯化试剂和粗产品的混合物。一般有两种蒸馏方法:常压蒸馏和减压蒸馏
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以上的参考答案由吴明江提供,仅供参考。
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