010 M Potassium Chromate Is Slowly Added to a Solution

question 123

Multiple Choice

0.10 M potassium chromate is slowly added to a solution containing 0.20 M AgNO₃ and 0.20 M Ba(NO₃) ₂.What is the Ag⁺ concentration when BaCrO₄ just starts to precipitate? K_sp for Ag₂CrO₄ and BaCrO₄ are 1.1 × 10^-12 and 1.2 × 10^-10,respectively.

• A)6.5 × 10^-5 M
• B)1.3 × 10^-4 M
• C)3.2 × 10^-4 M
• D)4.3 × 10^-2 M

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