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sodium sulfate and barium nitrate

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Adding colorless sodium sulfate to colorless barium nitrate produces a white precipitate.

Solution A: 0.2 M sodium sulfate (colorless)
Solution B: 0.1 M barium nitrate (colorless)
Precipitate: (white)
Ba(NO₃)₂(aq) + Na₂SO₄(aq) --> BaSO₄(s) + 2 NaNO₃(aq)

(2)

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