Problema Solution
Frank has 1 liter of 20% sulfuric acid solution. How much of a 12% sulfuric acid solutions must he mix with 1 liter of 20% solution to make a 15% sulfuric acid solution?
Answer provided by our tutors
let x = liters of 12% sulfuric acid solution
0.20*1 + 0.12*x = 0.15(1 + x)
by solving we find
x = 1.67 l
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