Problema Solution
Todd has 1 liter of 19% sulfuric acid solution. How much of a 9% sulfuric acid solution must he mix with 1 liter of 19% solution to make a 11% sulfuric acid solution?
Answer provided by our tutors
let
x = liters of 9% sulfuric acid solution needed for the mix
0.19*1 + 0.09*x = 0.11(1 + x)
by solving we find
x = 4 l
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4 liters of 9% sulfuric acid solution should be used for the mix.