A laboratory technician needs to make a 108 -liter batch of a 20 % acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10 % to get the desired concentration?

12 liters of pure acid and 96 liters of 10% acid solution Using mass and component balance: Let x = liters of pure acid and y = liters of 10% acid Mass balance: x + y = 108 Component balance: 100%*x + 10%*y = 20%*108 or x + 0.1y = 21.6 Solving for x and y: x = 12 and y = 96