Concept explainers
At 298 K, the solubility product constant for Pb(IO3)2 is 2.6 × 10−13, and the standard reduction potential of the Pb2+(aq) to Pb(s) is −0.126 V.
- (a) Find the standard potential of the half-reaction
(Hint: The desired half-reaction is the sum of the equations for the solubility product and the reduction of Pb2+. Find ΔG° for these two reactions, and add them to find ΔG° for their sum. Convert the ΔG° to the potential of the desired half-reaction.)
- (b) Calculate the potential of the Pb/Pb(IO3)2 electrode in a 3.5 × 10−3 M solution of NaIO3.
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