Question 4

Consider the following cell reaction:
$$2Fe_{(s)} + O_{2(g)} + 4H^+_{(aq)} \rightarrow 2Fe^{2+}_{(aq)} + 2H_2O(l) E^\circ = 1.67 V$$ At $$[Fe^{2+}] = 10^{-3} M, P(O_2) = 0.1$$ atm and pH = 3, the cell potential at $$25^\circ C$$ is

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