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Question 2: [15 marks] A feed solution at 25C contains 2800mg NaCI/L (p = 999.1 kg/m). The permeability constant An = 3.30x104 kg solvent/s.m.atm and As = 2.50x10m/s. Using a AP of 38.0 atm, calculate: a) The permeate concentration in kg NaCl/m? [10 marks] b) The final solute rejection [2 marks] c) The solvent flux [2 marks] d) The salt flux [1 marks] Useful data and formulae: RMM: Na = 23.00 Cl = 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 NwP (AP - An) = Aw (AP - AM) N, = ks (c1 - cz) = A(C1 Cy) Lm NE Nwcz Cz R=-6 R= B(AP-AT) 1+B(AP-A7) C B = Aw Astwa