An evaporator is fed with 15000 Kg/h of a solution containing 10 % NaCl, 15 % NaOH and rest water. In the operation, water is evaporated and NaCl is precipitated as crystals. The thick liquor leaving the evaporator contains 45 % NaOH. 2 % NaCl and rest water. Calculate (a) Kg/h water evaporated (b) Kg/h salt precipitated (c) Kg/h thick liquor