Construct the phase diagram for the system, and draw in the tie-lines.

4.  An aqueous solution contains 46% by weight of ethyl alcohol. Using the diagram of the preceding problem, find how much alcohol would be extracted from 25 g of this solution by 100 g of C₆H_6.

3. The following data are for the system water- alcohol-benzene at 25C. The first two columns give the percentages by weight of alcohol and benzene in one layer, while the third column gives the percentage by weight of water in the layer conjugate to these. Layer 1 Layer 2 % C6H6 % C2H5OH % H20 1.3 38.7 9.2 50.8 20.0 52.3 3.2 30.0 49.5 5.0 40.0 44.8 6.5 60.0 33.9 13.5 80.0 17.7 34.0 95.0 4.8 65.5