A platinum electrode is immersed in a solution containing 0.1 M $\mathrm{Fe^{2+}}$ and 0.1 M $\mathrm{Fe^{3+}}$. Its potential is found to be 0.77V against SHE. Under standard conditions and considering activity coefficients to be equal to unity, the potential of the electrode, when the concentration of $\mathrm{Fe^{3+}}$ is increased to 1 M, is ____
Answer
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