Given the standard electrode potentials: $Fe^{2+}_{(aq)} + 2e^{-} \rightarrow Fe_{(s)}$ $(E^o = -0.44 \ V)$ and $Fe^{3+}_{(aq)} + e^{-} \rightarrow Fe^{2+}_{(aq)}$ $(E^o = 0.77 \ V)$. If $Fe^{2+}$,$Fe^{3+}$,and a piece of $Fe$ are kept together,what happens?
- A$Fe^{3+}$ concentration increases.
- B$Fe^{3+}$ concentration decreases.
- CThe ratio $\frac{[Fe^{2+}]}{[Fe^{3+}]}$ remains constant.
- D$Fe^{2+}$ concentration decreases.
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