SOLUTION: Two solutions of salt water contain 0.09% and 0.25% salt respectively. A lab technician wants to make 1 liter of solution which contains 0.19% salt. How much of each solution shoul

Question 360204: Two solutions of salt water contain 0.09% and 0.25% salt respectively. A lab technician wants to make 1 liter of solution which contains 0.19% salt. How much of each solution should she use?

Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.25X+.09(1-X)=.19*1
.25X+.09-.09X=.19
.16X=.19-.09
.16X=.10
X=.10/.16
X=.625 L. OF 25% SOLUTION IS USED.
1=.625-.375 L. OF 9% SOLUTION IS USED.
PROOF:
.25*.625+.09*.375=.19*1
.15625+.03375=.19
.19=.19
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