A solution is made up by adding 0.839 g of silver(I) nitrate and 1.024 g of lead(II) nitrate to enough water to make 492 mL of solution. Solid sodium chromate, Na2CrO4, is added without changing the volume of the solution.
(a) Which salt will precipitate first, Ag2CrO4 or PbCrO4?
(b) What is the concentration of the chromate ion when the first salt starts to precipitate?
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