SOLUTION: a chemist needs 400 ml of 12% hydrochloric acid solution. there are 10% and 15% solutions available, how much of each solution should be mixed to get the desired result

SOLUTION: a chemist needs 400 ml of 12% hydrochloric acid solution. there are 10% and 15% solutions available, how much of each solution should be mixed to get the desired result

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Question 932540: a chemist needs 400 ml of 12% hydrochloric acid solution. there are 10% and 15% solutions available, how much of each solution should be mixed to get the desired result
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
x the 15% amount
.15x + .10(400ml - x) = .12(400ml)
x = .02(400ml)/.05 = 160ml, the 15% amount
(400ml - x) the 10% amount
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