Chapter 8.4, Problem 29PP

In the mitochondria of human cells, energy is provided by the oxidation and reduction reactions of the iron ions in the cytochromes in electron transport, Identify each of thefollowing as an oxidation or a reduction:

$\begin{array}{l}a.F{e}^{3+}{e}^{-}\to F{e}^{2+}\\ b.F{e}^{2+}\to F{e}^{3+}+e^{-}\end{array}$