In which aqueous solution would the smallest amount of barium sulfate dissolve? A) 0.1 M Mg(OH)₂ B) 0.1 M Na₂SO₄ C) 0.1 M Al₂(SO₄)₃ D) 0.1 M Ba(NO₃)₂ E) 0.1 M HCl

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Barium sulfate is less soluble in solutions containing common ions. Al₂(SO₄)₃ provides sulfate ions, which are common ions with BaSO₄, reducing its solubility the most.

In Which Aqueous Solution Would the Smallest Amount of Barium