Reverse Osmosis experiments were carried out at 25C to determine the permeability constants and solute rejection. The feed solution is 12 kg NaCl/m3 having a density of 1005 kg/m3 .The area of the membrane available is 40 cm2 . The required product concentration is 0.468 kg NaCl/m3 having a density of 997 kg/m3 . The measured product flow rate is 3.84 108 m3/s and the pressure difference used 56 atm.

Determine

(a) the Osmotic pressure of the feed,

(b) the Osmotic pressure of the permeate (product),

(c) the permeability constant for water,

(d) the permeability constant for salt,

(e) the solution rejection R.