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第16章 提纯粗盐(2 / 2)

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“这只是第一次提纯而已,虽然比刚开始好了一些,但最好不要直接食用。”刘芸摇头说道。

“还不能食用,好麻烦。”王倩倩说道。

“别着急,已经很快了。”刘芸说道。

言罢,刘芸把这次提纯的盐碾碎,又把刚刚剩下的半瓶盐水拿来。

在高中生和初中生震惊的目光中,北大高才生把提纯了一次的粗盐,全都倒进了半瓶盐水中,并且不断进行搅拌。

只不过,神奇的一幕出现了,这次的粗盐竟然没有溶于水,全都以晶体的形态,留在瓶子底部。

搅拌足够的时间后,刘芸把盐水倒出来,对留在瓶底的晶体进行加热。

因为这次本就没多少水分,所以很快就完成了蒸馏这一步,再次得到了盐。

只是不知道是眼睛出了问题,还是这次提纯真的有用,赵迁和王倩倩震惊地发现,这次提纯的盐更白了。

“尝一尝吧!”

刘芸把经过两次提纯的盐放在赵迁和王倩倩面前。

“我先来!”

王倩倩用手捏了一点点,犹豫下放进嘴里。

细细品味后,她不可思议道:“太神奇了,这次的盐已经没多少苦味了,小芸,你是如何做到的?”

赵迁也满脸不解的看过去,他也没搞明白,这是怎么一回事。

刘芸也不藏私,微笑着解释道:“第一步提纯,是把不溶于水的杂质去掉……第二步提纯,则是把溶于水的杂质去掉。”

“只不过,因为我们现在条件不够,所以我采用的是饱和度提纯方法……你们明白什么是饱和吗?”

王倩倩摇头表示不知。

赵迁凝眉思考,说道:“是不是一种物质在水中溶解的最大限度,继续加入这种物质,不能再溶解了。”

“差不多吧!”

刘芸说道:“最开始我不断往淡水中加粗盐,目的就是想让盐水达到饱和,这个时候,我继续加入盐,会出现什么情况?”

“饱和了,自然就不溶了。”

赵迁回答完毕,接着灵光一闪,恍然大悟道:“每种物质的饱和度是不同的,刚刚的盐水只是盐的饱和度达到了最大限度,但粗盐中其他溶于水的物质,并没有达到饱和度。”

“因此,再次加入粗盐,盐不溶于水,其他的杂质溶于水,这样得到的盐就更加精细了。”

刘芸听完赵迁的话,微笑着说道:“不错,就是这个道理,你很厉害。”

赵迁得到刘芸的夸奖,当即有种被老师称赞的优越感,斜视一眼旁边的初中生,把脑袋抬得高高的。

那模样仿佛在说,初中生,体会到学历碾压了吗?

“幼稚!”

王倩倩则冷哼一声撇过头,一脸我不跟逗比一般见识的模样。

但她紧握的双拳表明,她现在很不爽。

喜欢与美女明星荒岛求生的那些事儿请大家收藏:与美女明星荒岛求生的那些事儿本站更新速度全网最快。

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