Question: 5. A saturated MgSO4 solution at 130F is fed to a crystallizer operating at 50F. The solution leaving the crystallizer is saturated. Magnesium sulfate solubilities

5. A saturated MgSO4 solution at 130F is fed to a

5. A saturated MgSO4 solution at 130F is fed to a crystallizer operating at 50F. The solution leaving the crystallizer is saturated. Magnesium sulfate solubilities are 35wt% MgSO4 at 130F and 23 wt% MgSO4 at 50F. a. Determine from Table 6.5-1 the molecular formula of the crystalline salt that forms. b. Calculate the feed rate to the crystallizer if 1000 kg/h of the salt is produced. TABLE 6.5-1 Hydrated MgSO4 Salts Form Name Wt% MgSO4 Conditions MgSO4 Anhydrous magnesium sulfate 100.0 > 100C MgSO4 H2O Magnesium sulfate monohydrate 87.0 67 to 100C MgSO4-6H2O Magnesium sulfate hexahydrate 52.7 48 to 67C MgSO4.7H2O Magnesium sulfate heptahydrate 48.8 2 to 48C MgSO4.12H2O Magnesium sulfate dodecahydrate 35.8 -4 to 2C

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