Answer to Question #84764 in Organic Chemistry for Mo

Question

community in Alaska was so impressed with the mine reclamation at the Peanut Mine in Crested Butte (see lecture 6 notes), that they wanted to follow a similar approach. There are a few differences that must be considered:
The community is at an elevation of 250 feet above sea level - you can assume atmospheric pressure = 1 atm
The metal of concern is cadmium (not lead)
The pH is to be raised to 9.0.

Using the correct graph (handouts or Lecture 6) describing the carbonate system, graphically determine the carbonate concentration at a pH of 9 (at sea level, [H2CO3] = 10-4.87M)
Will cadmium (II) carbonate or cadmium (II) hydroxide precipitate first? Compute the cadmium concentrations at equilibrium for both compounds at the given pH, graphically determined [CO3-2] to support your answer.

Answer 1

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