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12. A solution is 0.010M in K2SO4 and 0.010MK2CrO4.A solution of Pb(NO2)2 is added slowly without any appreciable change in volume. Which salt will precipitate

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12. A solution is 0.010M in K2SO4 and 0.010MK2CrO4.A solution of Pb(NO2)2 is added slowly without any appreciable change in volume. Which salt will precipitate first and what is the [Pb2] required to start the precipitation? (Kp of PbSO4=1.6104;Kpp of PbCrO4=2.31013)

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