Chapter 20, Problem 28QAP

Using Table 17.1 (Chapter 17) calculate E° for
(a) ${\text{2Co}}^{3+}\left(aq\right)+{\text{H}}_2\text{O}\to 2{\text{Co}}^{2+}\left(aq\right)+\frac{1}{2}{\text{O}}_2\left(g\right)+2{\text{H}}^{+}\left(aq\right)$
(b) ${\text{2Cr}}^{2+}\left(aq\right)+{\text{I}}_2\left(s\right)\to 2{\text{Cr}}^{3+}\left(aq\right)+2{\text{I}}^{-}\left(aq\right)$