Prob. 2 A cellulose acetate membrane having an area of 3.5 x10-3 m² is used at 25°C to determine the permeability constants for reverse osmosis of a feed salt solution containing 12 kg NaCl/m³ (density, p = 1005.5 kg/m³). The product solution has a concentration of 0.45 kg- NaCl/m³ (p=997 kg/m³). The measured product flow rate is 3.6x10-8 m³/s. The pressure difference used is 58 atm. Calculate (1) the permeability constants for water, Aw in kg solvent/s- m²-atm, (2) the permeability constant of the solute NaCl A, in m/s.