Problema Solution
How many milliliters of a 12% acid solution and how many milliliters of a 4% acid solution must be mixed to obtain 40ml of a 10% acid solution?
Answer provided by our tutors
set up the equation
let x = milliliters of acid
0.12x + 0.04(40-x) = 0.10(40)
0.12x + 1.6 - 0.04x = 4
x = 30
so we will need 30 mL of 12 % acid and 10 mL of 4% acid to make a 10% solution