SOLUTION: It only have 80percent alcohol nedd 1000 ml of 50percent alcohol how much volume of 80 do I need and how much dist water

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Question 834240: It only have 80percent alcohol nedd 1000 ml of 50percent alcohol how much volume of 80 do I need and how much dist water
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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It only have 80percent alcohol need 1000 ml of 50percent alcohol.
how much volume of 80 do I need and how much dist water
:
let a = amt distilled water to be add to accomplish this
.80(1000) = .50(a+1000)
800 = .5a + 500
800 - 500 = .5a
300 = .5a
a = 300/.5
a = 600 ml of distilled water to be added