outlet stream from effect II. 24 A crude salt when dissolved in water yields brine whose composition is 15% by we of NaCl, 1% NaBr and 3% MgCl2. Some water is evaporated and 40% of salt crystallises in pure form. On evaporation, brine looses 70% water. For 100 original brine, calculate (a) weight % of MgCl2 and NaBr in the concentrate : (b) The composition of cake if all the water is evaporated. Vapour