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A solution is 0.010 M in both Br- and SO4. A 0.250M solution of lead (II)...

A solution is 0.010 M in both Br- and SO4. A 0.250M solution of lead (II) nitrate is slowly added to it. The Ksp for PbSO4 is 1.8 x 10^-8. The Ksp for PbBr2 is 6.0 x 10^-6.
A. Which anion will precipitate first?
B. what is the concentration in the solution of the first ion when the second one starts to precipitate at 25 degrees celsius?

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