Problema Solution
Doreen Schmidt is a chemist. She needs to prepare 36 ounces of a 13% hydrochloric acid solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get this solution.
Answer provided by our tutors
let
x = oz of the 18% solution
y = oz of the 9% solution
She needs to prepare 36 ounces of a 13% hydro-chloride acid solution:
x + y = 36
0.18x + 0.09y = 0.13*36
by solving the above system of equations we find:
x = 16 oz
y = 20 oz
click here to see the step by step solution of the system of equations:
16 ounces of 18% solution and 20 ounces of 9% solution should be used for the mix.