SOLUTION: In a chemistry class, 9 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?

SOLUTION: In a chemistry class, 9 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?

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Question 306553: In a chemistry class, 9 liters of a 4% silver iodide solution must be mixed with a 10% solution to get
a 6% solution. How many liters of the 10% solution are needed?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.04*9+.10x=.06(9+x)
.36+.10x=.54+.06x
.10x-.06x=.54-.36
.04x=.18
x=.18/.04
x=4.5 liters of 10% solution is used.
Proof:
.04*9+.10*4.5=.06(9+4.5)
.36+.45=.06*13.5
.81=.81
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