Question: Use the data in Table 25.6 for the exchange current density and transfer coefficient for the reaction Fe3++ e-7 Fe2+on platinum at 25C to determine

Use the data in Table 25.6 for the exchange current density and transfer coefficient for the reaction Fe3++ e"-7 Fe2+on platinum at 25°C to determine what current density would be needed to obtain an over potential of 0.30 Vas calculated from
(a) The Butler-Volmer equation, and
(b) The Tafel equation. Is the validity of the Tafel approximation affected at higher over potentials (of 0.4 V and more)?

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