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yalefield

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老汉一枚

[求助] 请教:acid finally the choice

In the organic laboratory, crystallization is usually the most rapid and convenient method for purifying the products of a reaction. Initially you will be told which solvent to use to crystallize a given substance and how much of it to use; Later on you will judge how much solvent is needed, acid finally the choice of both the solvent and its volume will be left to you. It takes both experience and knowledge to pick the correct solvent for a given purification.

请问,acid finally the choice 中,acid是什么意思?
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古可ぷ

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acid所处的位置显然是个名词的,如果是即的话
用and 承接就好多了,但是用and下文就说不通了
在先考虑溶剂和溶剂体积后考虑另外一个
所以是没有错的
非吾小天下,才高而已;非吾纵古今,时赋而已;非吾睨九州,宏观而已;三非焉罪?无梦至胜
3楼2011-09-17 10:09:20
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古可ぷ

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yalefield(金币+3): 可是,俺觉得,acid这个地方,应该是一个“即”,是某个拉丁文词汇。是不是原作者打错了? 2011-09-17 09:54:19
就是酸的意思
意思说在重结晶中首先考虑溶剂和溶剂的用量
然后再考虑加入酸等
非吾小天下,才高而已;非吾纵古今,时赋而已;非吾睨九州,宏观而已;三非焉罪?无梦至胜
2楼2011-09-17 09:39:13
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yalefield

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老汉一枚

(1)所以,俺怀疑是打错了;
(2)从内容来说,与“酸(acid)”也没什么关系。
(3)俺觉得是不是可以这样:
Initiall,y you will be told which solvent to use to crystallize a given substance and how much of it to use.
Later on, you will judge how much solvent is needed.
Finally, the choice of both the solvent and its volume will be left to you.
4楼2011-09-17 10:58:14
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