Question

0.10 M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.50 M Ba(NO3)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate? The Ksp for Ag2CrO4 and BaCrO4 are 1.1 10-12 and respectively.
A) 6.5 10-5 M
B) 1.3 10-4 M
C) 3.2 10-4 M
D) 6.8 10-2 M

Answer

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