SOLUTION: A flask contains 500 ml of an 80% alcohol solution in water. How much of this solution must be drawn off and replaced by water to obtain a solution having a concentration of 25% a

Question 1186856: A flask contains 500 ml of an 80% alcohol solution in water. How much of this solution must be
drawn off and replaced by water to obtain a solution having a concentration of 25% alcohol?

Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
Begin with 500 ml and finish with 500 ml. volume

v, amount to remove and replace
----------because 25% is the desired finished concentration.

---------------compute this.
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