Anhydrous ferrous sulfate (FeS04) crystals are produced from an aqueous solution

Question

Anhydrous ferrous sulfate (FeS04) crystals are produced from an aqueous solution in a two step process. A solution of 0.271 mass fraction of FeSO4 and 0.729 mass fraction H20 at 46.0 enters a crystallizer. Within the crystallizer, the temperature drops to 5.88, producing iron (1) sulfate heptahydrate (FeSO4·7H2O) crystals and an aqueous FeSO4 solution. The FeSO4 7H20 crystals are sent through a dryer that produces anhydrous FeSO4 and water. If the facility wishes to produce 34.9 pounds of anhydrous FeSO4 per hour, what are the mass flow rates of the aqueous FeSO4 solutions entering and leaving the crystallizer, and what is the composition of the aqueous solution leaving the crystallizer? For the temperature ranges described, the solubility of FeSO4 in water is described by: y 0.6578T+ 14.282 where Tis the temperature of the solution in "C and y is the solubility of FeSO4 in g FeSO/100 g H20.

Explanation / Answer

a) 19.13
b) 0.27
c) 0.039

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