In qualitative analysis, Ag+, Hg2+2 and Pb2+ are separated from other cations by

Question

In qualitative analysis, Ag+, Hg2+2 and Pb2+ are separated from other cations by the addition of HCl.

a. Calculate the concentration of Cl? required to just begin the precipitation of AgCl in a solution having metal-ion concentrations of 0.036M .

b. Calculate the concentration of Cl? required to just begin the precipitation of Hg2Cl2 in a solution having metal-ion concentrations of 0.036M

c. Calculate the concentration of Cl? required to just begin the precipitation of PbCl2 in a solution having metal-ion concentrations of 0.036M

d. What fraction of the Pb2+ remains in the solution when the Ag+ just begins to precipitate?

Explanation / Answer

a) Ksp, for AgCl in water is 1.77

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