In this chemistry question, the formation of a white precipitate of barium sulfate is explained through a balanced equation and the identification test for barium sulfate presence.
(a) The balanced chemical equation for the reaction is: BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2 NaCl (aq).
(b) Yes, a white precipitate of barium sulfate (BaSO4) forms during the reaction.
(c) To test for the presence of barium sulfate, one can add hydrochloric acid (HCl) to the precipitate. If it dissolves and a gas is released (carbon dioxide), it confirms the presence of barium sulfate.
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