At 20C, water and glycerol (C 3 H 8 O 3 ) are completely miscible in each other in the liquid phase.

 = 0.3 (where xgly is the glycerol mole fraction) and volume of 300 cm3 at 20°C. How many grams of pure liquid H2O should be added to solution A to increase the volume to 400 cm3? What is the composition of the final solution?

b)    Repeat part a) assuming that glycerol and H2O form ideal liquid solutions. What does the difference in this answer from that obtained in part a) reflect about the interaction between H2O and glycerol in their actual solutions?