SOLUTION: You need to strengthen a 25% alcohol solution with a pure alcohol solution to obtain a 70% solution. How much pure alcohol should you add to 100 milliliters of the 25% solution?

Question 1046116: You need to strengthen a 25% alcohol solution with a pure alcohol solution to obtain a 70% solution. How much pure alcohol should you add to 100 milliliters of the 25% solution?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = ml of pure alcohol to be added
ml of pure alcohol in the 25% solution
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You need 150 ml of pure alcohol
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check:

OK
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