An Aqueous Solution Contains [Ba²⁺] = 5

question 11

Multiple Choice

An aqueous solution contains [Ba²⁺] = 5.0 × 10^-5 M,[Ag⁺] = 3.0 × 10^-5 M,and [Zn²⁺] = 2.0 × 10^-7 M.Sodium oxalate is slowly added so that [C₂O₄^2-] increases.

Which one of the oxalates precipitates first?

• A)BaC₂O₄
• B)Na₂C₂O₄
• C)ZnC₂O₄
• D)Ag₂C₂O₄
• E)ZnC₂O₄ and Ag₂C₂O₄ precipitate together

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