Problema Solution
A prescription call For 280ml of a 20% acid solution, the chemist has 50% and 15% acid solution in stock. How many millimeter of each solution should the chemist Mix to obtain the Desire prescription?
Answer provided by our tutors
let
x = the ml of the 50% acid solution needed
y = the ml of the 15% acid solution needed
the mix is 280ml of a 20% acid solution thus we have
x + y = 280
0.50*x + 0.15y = 0.20*280
0.5x + 0.15y = 56
by solving the system of equations
x + y = 280
0.5x + 0.15y = 56
we find
x = 40 ml
y = 240 ml
click here to see the step by step solution of the system of equations
the chemist needs to mix 40 ml of 50% acid solution with 240 ml of 15% acid solution.