Problema Solution
Jon needs 7 liters of a 35% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid solution: one in an unlimited supply of the 7% solution and the other an unlimited supply of the 56% solution. How many liters of each solution should Jon use?
Answer provided by our tutors
let
x = liters of the 7% solution
y = liters of the 56% solution
Jon needs 7 liters of a 35% solution means
x + y = 7
0.07x + 0.56y = 0.35*7
by solving the above system of equations we find
x = 3 l
y = 4 l
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3 liters of the 7% solution and 4 liters of the 56% solution should be used for the mix.