To a Saturated Aqueous Solution of Barium Carbonate Is Added

question 1

Multiple Choice

To a saturated aqueous solution of barium carbonate is added just enough sodium sulfate to achieve a maximum sulfate concentration without precipitation of barium sulfate.If no complexes form and the "salt effect" is negligible,what is the concentration of the sulfate ion in this solution? [K_sp for barium carbonate is 1.6 × 10^-9;K_sp for barium sulfate is 7.9 × 10^-11]

• A)2.8 × 10^-5 M
• B)6.7 × 10^-6 M
• C)2.0 × 10^-6 M
• D)4.0 × 10^-5 M
• E)8.9 × 10^-5 M

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