SOLUTION: In a chemistry class, 5 liters of 4% silver solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?

Question 300319: In a chemistry class, 5 liters of 4% silver solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
In a chemistry class, 5 liters of 4% silver solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
.
Let x = liters of 10% solution added
then
.04(5) + .10x = .06(5+x)
.04(5) + .10x = .06(5+x)
.2 + .10x = .3 + .06x
.04x = .1
x = 2.5 liters
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