Problema Solution
Pure acid is to be added to a 10% acid solution to obtain 90L of 75% solution. What amounts of each should be used?
Answer provided by our tutors
Let
x = liters of pure acid, x>0
y = liters of 10% solution, y>0
x + y = 90
1.00*x + 0.10*y = 0.75*90
........
........
x = 65 L
y = 25 L
65 liters of pure acid and 25 liters of 10% acid solution should be used.