![]() The molecular weight of anhydrous magnesium sulphate is 120.4 and of the heptahydrate salt is 264.4. There are two unknown on the chart ( m 1 and m 2) and two independent molecular species on which balances may be written (MgSO 4 and H 2O), so that the problem can be solved. We assume that the solution leaving the crystallizer is in equilibrium with the solid crystals and is therefore saturated with MgSO 4. īasis: 1 tonne MgSO 4.7H 2O(s) Produced/h Determine the rate at which solution must be fed to the crystallizer to produce 1 metric ton (1 tonne, 1000kg) of magnesium sulphate heptahydrate per hour. Solubility data for magnesium sulphate show that a saturated solution at 10 oC constains 23.2 wt% MgSO 4. The stream leaving the crystallizer is a slurry of solid magnesium sulphate heptahydrate particles suspended in a liquid solution. ![]() ![]() An aqueous solution of magnesium sulphate at 104 oC containing 30.1 wt% MgSO 4 is fed to a cooling crystallizer that operates at 10 oC. ![]()
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