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Q3. 75 65 Use the liquid-liquid phase diagram for phenol(1) + water(2) at 1.00 bar plotted below to answer this question. a) Give the UCT and explain its significance. b) Give the mole-fraction solubility of phenol in water at 25 C. c) Give the mole-fraction solubility of water in phenol at 25 C. d) Does water have a retrograde solubility in phenol? Explain. e) Why would you expect phenol + water solutions to show positive deviations from Raoults law? f) A separatory funnel contains 5.0 moles of phenol and 20.0 moles of water at 35 C. Give the compositions xiu and xil of the upper (U) and the lower (L) solutions in the funnel. 55 Temperature. "C [7 ] 35 25 0 20 00 100 g) A 60 mol% phenol solution initially at 70 C is cooled. Give i) the temperature at which a second phase first appears ii) the composition of the second phase. mol % phenol -- page 2 1