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1. Consult an appropriate source and determine the Concentration of each of the following species, when...

1. Consult an appropriate source and determine the Concentration of each of the following species, when in Concentrated form: HCl, H2SO4, and NH3.

2. A 10mL solution of 0.010M HCl is mixed with 20mL of a 0.01M Pb2+ solution, giving a total volume of 30mL. What are the concentrations of Cland Pb2+ after the mixing? Will a precipitate of PbCl2 form? (Ksp = 1.7 x 10-5 for PbCl2 at 25oC.)

3. In the Group 2 precipitations, the Sulfide Ion (S2- ) is generated in an Acidic environment. If the H2S concentration is maintained at 0.1M and the pH = 1, what is the [S2- ] concentration? (Ka1 = 1 x 10-7 and Ka2 = 1 x 10-13 for H2S.)

4. In the Group 3 precipitations, the pH is raised by adding Ammonia. Suppose it is raised to pH = 9. What is the [S2- ] concentration under these conditions? Assume the H2S concentration is again 0.1M.

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1.3x10 H107 auud 2) N H 2 theee

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