Problema Solution
A chemist has 60% acid solution and 20% acid solution and wants to make 140mL of 35% acid solution. How many mL of each solution des he need to get the 140mL of 35% acid solution?
Answer provided by our tutors
let
x = mL of 60% acid solution
y = mL of 20% acid solution
the chemist needs to mix x and y to get 140 mL
x + y = 140
60% acid in x + 20% acid in y = 35% acid in 140 mL
0.60x + 0.20y = 0.35*140
by solving the system of equations
x + y = 140
0.60x + 0.20y = 0.35*140
we find
x = 52.5 mL
y = 87.5 mL
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