Question: Please solve this question using the mass balance approach. Thank you B5. A solution (400 kg of Na2SO4 in 1,000 kg of water) is cooled

Please solve this question using the mass balance approach. Thank you

B5. A solution (400 kg of Na2SO4 in 1,000 kg of water) is cooled from 80C to 25C in an agitated mild steel vessel of mass 150 kg. At 25C the stable crystalline form is Na2SO4.10H20. (a) If during cooling, 4% by weight of water is lost by evaporation, what is the theoretical crystal yield? [70 marks] (b) Which technique would you use to identify the product? Describe the principles of operation of this technique and explain how the crystal structure is determined. [30 marks] Additional data The specific heat of steel is 0.5 kJ kg-1 K-1 The mean heat capacity of the solution is 3.6 kJ kg-1 K-1 The solubility of anhydrous Na2SO4 at 25C is 28.1 kg/100 kg water Molar mass of hydrogen: 1 g mol-1 Molar mass of oxygen: 16 g mol- Molar mass of sodium: 23 g mol-1 Molar mass of sulphur: 32 g mol-1

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