First, we need to determine the oxidation states of Co and Fe in their respective complexes. In $\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}^{3+}$, the oxidation state of Co is +3, and in $\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}^{2+}$, the oxidation
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