SOLUTION: Please help me answer this question: how many milliliters of pure water must be added to 100ml of a 4% salt solution to make a 2.5% salt solution?

SOLUTION: Please help me answer this question: how many milliliters of pure water must be added to 100ml of a 4% salt solution to make a 2.5% salt solution?

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Question 504560: Please help me answer this question: how many milliliters of pure water must be added to 100ml of a 4% salt solution to make a 2.5% salt solution?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
100x.04=4ml salt
.025m=4
m=4/.025=160
Since you already have 100 ml of solution, you need to add 60 ml of pure water to get a 2.5% solution..
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