Problema Solution
In your chemistry lab, you have a bottle of 1% hydrochloric acid solution and a bottle of 5% hydrochloric acid solution. You need 100 milliliters of a 3% hydrochloric acid solution for an experiment. How many milliliters of each solution do you need to mix together?
Answer provided by our tutors
let
x = milliliters of 1% hydrochloric acid solution
y = milliliters of 5% hydrochloric acid solution
you need 100 milliliters of a 3% hydrochloric acid solution thus
x + y = 100
0.01x + 0.05y = 0.03*100
by solving the system of equations
x + y = 100
0.01x + 0.05y = 3
we find
x = 50 ml
y = 50 ml
click here to see the step by step solution of the system of equations
50 ml of 1% hydrochloric acid solution and 50 ml of 5% hydrochloric acid solution should be used for the mix.