Chapter 16, Problem 16.139MP

Consider the unbalanced equation:

     ${\text{I}}_{\text{2}}\left(s\right)\to {\text{I}}^{-}\left(aq\right)+{\text{IO}}_3{}^{-}\left(aq\right).$

1. (a) Balance the equation for this reaction in basic solution.
2. (b) Use the data in Appendix B and ΔG°_f for IO₃^– (aq) = –128.0 kJ/mol to calculate ΔG° for the reaction at 25 °C.
3. (c) Is the reaction spontaneous or nonspontaneous under standard-state conditions?
4. (d) What pH is required for the reaction to be at equilibrium at 25 °C when [I^–] = 0.10 M and [IO₃^–] = 0.50 M?