我想要稀釋酒精 - 酒精
By Genevieve
at 2006-05-16T00:00
at 2006-05-16T00:00
Table of Contents
我想把濃度500ml95%的酒精~稀釋成濃度為70%的酒精~請問我現在要加多少水呢??(最好能提供算式)
Update:
是500ml濃度95%(這樣寫才對)
Update 2:
500ml濃度95%的酒精~應該只有475ml的100%的酒精吧!!
哪來那麼多!!
Update:
是500ml濃度95%(這樣寫才對)
Update 2:
500ml濃度95%的酒精~應該只有475ml的100%的酒精吧!!
哪來那麼多!!
Tags:
酒精
All Comments
By John
at 2006-05-16T01:45
at 2006-05-16T01:45
95:70=x:500
95/70=x/500
交叉相乘
70x=95x500
x=47500/70
x=678
因x=酒精+水量
故678-500(酒精量)=178
所以你要+178ml的水喔~
By Rebecca
at 2006-05-19T00:21
at 2006-05-19T00:21
500ml-Xml=你要ㄉ答案
2006-05-16 11:23:20 補充：
bioprince 你好像沒看清楚他只要重量百分濃度^^X=678.xxxxxANS:178ml 水
By Elma
at 2006-05-17T09:34
at 2006-05-17T09:34
一、
100%酒精的ml數
500*95%=475
把475ml的純酒精變成濃度為70%的酒精，溶液ml數
475/70%=678
多出來的就是你要加的水
678-500=178
二、
(500*95%)/(500+X)=70%
X=178
By Oscar
at 2006-05-18T20:09
at 2006-05-18T20:09
526*0.7=368
500-368=132 (水)
這個就是答案
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