SOLUTION: If you have a solution that's 40% alcohol and another that's 70% alcohol how much of the 70% alcohol do you have to add to the 40% to make the 40% raise to 50% alcohol. Start with
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Question 358540: If you have a solution that's 40% alcohol and another that's 70% alcohol how much of the 70% alcohol do you have to add to the 40% to make the 40% raise to 50% alcohol. Start with 100 ml of the 70% solution? Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! .70*100+.40X=.50(100+X)
70+.40X=50+.50X
.40X-.50X=50-70
-.10X=-20
X=-20/-.10
X=200 ml. OF THE 40% ALCOHOL IS USED.
PROOF:
.70*100+.40*200=.50(100+200)
70+80=.5*300
150=150
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