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A sample of wastewater contains 0.0020 M Cd2+ and 0.0020 M Cu2+. Calculate the minimum amount...

  1. A sample of wastewater contains 0.0020 M Cd2+ and 0.0020 M Cu2+. Calculate the minimum amount of CO32- (in M) required to precipitate out CdCO3 and CuCO3. Which heavy metal will precipitate out first when solid Na2CO3 is added? Ksp of CdCO3 = 6.2 x 10-12 and Ksp of CuCO3 = 2.5 x 10-10 at 25ºC.
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