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A (3.6500 g) of impure ammonium aluminium sulfate (NH4Al(SO4)2)) was treated with ammonia (NH3(aq)) producing hydrous alumina Al2O3.XH20. The collected precipitate was filtered, washed, and

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A (3.6500 g) of impure ammonium aluminium sulfate (NH4Al(SO4)2)) was treated with ammonia (NH3(aq)) producing hydrous alumina Al2O3.XH20. The collected precipitate was filtered, washed, and ignited at 1000 C to give 0.4935 g Al2O3 (Mw 101.9635 g/mol). Determine % Al2O3. (2 Marks) b. %AI (3 Marks) Express concentration of Al in ppm. (2 Marks) a

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