A saturated solution containing 1500 kg of potassium chloride at 360 K is cooled in an open tank to 290 K. If the density of the solution is 1200 kg/m3, the solubility of potassium chloride (kg)/100 parts of water by mass is 53.55 at 360 K and 34.5 at 290 K. If the solubility of potassium chloride is increased from 53.55 to 42.13, determine the capacity of tank and mass of crystal obtained. Justify your answer. (9 marks)