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Question 2: [15 marks] A feed solution at 25C contains 3500mg NaCIL (p = 999.5 kg/m3). The permeability constant Aw = 3.50x10 kg solvent/s.matm and As = 2.50x10 m/s. Using a AP of 35.5 atm, calculate: a) The solvent flux b) The solute rejection [2] c) Permeate concentration in kg NaCl/m [2] d) The salt flux [1] [10] Useful data and formulae: RMM: Na = 23.00 C1 = 35.45 Table 1: Osmotic pressures of Various Sodium Chloride Solutions at 25C g mol NaCl/kg H2O Density (kg/m) Osmotic Pressure (atm) 0 997 0 0.01 997.4 0.47 0.10 1001.1 4.56 0.50 1017.2 22.55 1.00 1036.2 45.80 Nw Pw ( - ) Lom Aw(AP - An) NE DK: (61 cz) = A,(C1 cz) Ng = Nwcz Cwz R = C1-C2 R= B(AP-AT) 1+B(AP-AT) Aw B = AgCwz