化學題目重量百分率濃度 - 酒精
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By Olive
at 2008-03-12T00:00
at 2008-03-12T00:00
Table of Contents
95%藥用酒精配製成70%溶液
試問取100ml的95%藥用乙醇
要加多少的水去稀釋?
要如何去解
試問取100ml的95%藥用乙醇
要加多少的水去稀釋?
要如何去解
Tags:
酒精
All Comments
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By Linda
at 2008-03-12T13:33
at 2008-03-12T13:33
所以要稀釋成70%的溶液代表比例要一樣
所以
95/(100+X)=70%
>>>X約等於35.7ml
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By Candice
at 2008-03-13T10:39
at 2008-03-13T10:39
你到底是要問重量百分率濃度還是體積百分率濃度啊?!
你題目明明給100ml的95%藥用乙醇,100ml是體積耶!!
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By Megan
at 2008-03-16T22:25
at 2008-03-16T22:25
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0.7X=95
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X=135.7
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135.7-100=35.7 (35.7ml)
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我對化學精通不深
隨意解解
錯了就別用
...
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