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The theoretical yield of alum expected from0.9875 gof aluminum foil is17.36 g.Let's consider theoverall equationfor the obtaining of alum from aluminum2 Al(s) + 2 KOH(aq) + 2 H₂O(l) + 4 H₂SO₄(aq) ⇒ 2 KAl(SO₄)₂(s).12H₂O(l) + 3 H₂(g)We can calculate the theoretical yield of alum from0.9875 gofAlconsidering the following relationships:The molar mass of Al is26.98 g/mol.The molar ratio of Al to alum is2:2.The molar mass of alum is474.39 g/mol.The theoretical yield of alum expected from0.9875 gof aluminum foil is17.36 g.Learn more:brainly.com/question/14966377...