For a solution containing 0.0010 M Ba2+ and 0.0010 M Ag+, it is desired to precipitate one of the ions as its chromate (CrO42-) salt to the maximum possible degree without precipitating any of the other cation. From this solution, which ion can be selectively first-precipitated by controlled addition of CrO42-? Hint: calculate [CrO42-] needed to precipitate each ion from the solution.
Ksp(Ag2CrO4) = 1.2x10^-12 Ksp(BaCrO4) = 2.1x10^-10

Question

For a solution containing 0.0010 M Ba2+ and 0.0010 M Ag+, it is desired to precipitate one of the ions as its chromate (CrO42-) salt to the maximum possible degree without precipitating any of the other cation. From this solution, which ion can be selectively first-precipitated by controlled addition of CrO42-? Hint: calculate [CrO42-] needed to precipitate each ion from the solution.
Ksp(Ag2CrO4) = 1.2x10^-12 Ksp(BaCrO4) = 2.1x10^-10

anonymous · Answer

a compound with the empirical formula CH2 has a molar mass of 70 g/mol. what is the molecular formula for this compound?