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Chem 27

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An antacid tablet weighing 3.084 g was dissolved and diluted to 100.0 mL in a volumetric flask. A 25.00-mL aliquot was removed and treated with sufficient 8-hydroxyquinoline to precipitate all of the aluminum and magnesium. After proper collection and drying, this precipitate weighed 1.7748 g. Another 25.00-mL aliquot of the sample was treated with enough ammonia to precipitate just Al(OH)3. After ignition at 800°C, this precipitate weighed 0.1167 g. Calculate the % Al and % Mg in the antacid.

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