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

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.