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Question
Translate the following statement into chemical equation and then balance it.
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
Solution
\[\ce{BaCl2_{(aq)} + Al2(SO4)3_{(aq)} -> AlCl3_{(aq)} + BaSO4_{(s)}}\]
Balanced equation:
\[\ce{3BaCl2_{(aq)} + Al2(SO4)3_{(aq)} -> 2AlCl3_{(aq)} + 3BaSO4_{(s)}}\]
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