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2005kongying

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[交流] 【求助】乙醇的量是多少?

The synthesis gel was prepared by hydrolyzing tetraethyl
orthosilicate (31.20 g, 150 mmol) in an ethanolic solution (0.527M)
of hexamethonium dihydroxide (HM(OH)2, 79.63 g, 42 mmol) with
continuous stirring until all the ethanol had completely evaporated.
Then, a 49 wt% aqueous solution of HF (3.495 g, 84 mmol) was
introduced and water was added to give a water/silica ratio of 7. The final gel composition had the following molar composition:
SiO2 : 0:28HM(OH)2 : 0:56HF : 7H2O
文献里 ethanolic solution (0.527M)到底要加多少乙醇啊?
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我把你嵌在一滴泪里,幻想千年后是琥珀,我不敢低头,怕那那颗泪坠下,碎了你,碎了我,碎了我千年的梦
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8930401

544

★
2005kongying(金币+1,VIP+0):544怎么算的啊,我不会算 9-11 08:55
可以自己算一下啊
2楼2009-09-11 08:29:20
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qjj2005

铜虫 (正式写手)

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2005kongying(金币+2,VIP+0):谢谢哦,我也一直纳闷呢 9-11 09:04
an ethanolic solution (0.527M)
of hexamethonium dihydroxide (HM(OH)2, 79.63 g, 42 mmol)
c=n/v  缺少变量,不能求出乙醇的量
在此,我猜有两种可能:
1)  0.527M中M为小写m,作者手误
2)  作者加入定量乙醇后,量得体积,求的c
小钱
3楼2009-09-11 08:58:12
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351

铁杆木虫 (知名作家)

研发高手

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2005kongying(金币+1,VIP+0):就是想重复一下的 9-11 11:05
这个是作者的心血啊,数据说白了,你不是可以重复了吗?自己摸索一下吧
4楼2009-09-11 11:03:22
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