What is the standard reduction potential (E^o | vedclass

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(A) The standard Gibbs free energy change is given by $\Delta G^o = -nFE^o$.For reaction $(i)$: $Fe^{2+} + 2e^- 	o Fe$,$E^o = -0.47 \ V$,so $\Delta G

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$-0.057$

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(A) The standard Gibbs free energy change is given by $\Delta G^o = -nFE^o$.For reaction $(i)$: $Fe^{2+} + 2e^- 	o Fe$,$E^o = -0.47 \ V$,so $\Delta G^o_1 = -2 	imes F 	imes (-0.47) = 0.94 \ F$.For reaction $(ii)$: $Fe^{3+} + e^- 	o Fe^{2+}$,$E^o = +0.77 \ V$,so $\Delta G^o_2 = -1 	imes F 	imes (+0.77) = -0.77 \ F$.For the overall reaction $(iii)$: $Fe^{3+} + 3e^- 	o Fe$,the sum of the reactions is $(i) + (ii)$.Therefore,$\Delta G^o_3 = \Delta G^o_1 + \Delta G^o_2 = 0.94 \ F - 0.77 \ F = 0.17 \ F$.Using $\Delta G^o_3 = -nFE^o_{Fe^{3+}/Fe}$,where $n = 3$:$0.17 \ F = -3 	imes F 	imes E^o_{Fe^{3+}/Fe}$$E^o_{Fe^{3+}/Fe} = \frac{0.17 \ F}{-3 \ F} = -0.057 \ V$.

What is the standard reduction potential $(E^o)$ for $Fe^{3+} \to Fe$ ? ............... $V$
Given that :
$Fe^{2+} + 2e^- \to Fe;$ $E^o_{Fe^{2+}/Fe} = -0.47 \ V$
$Fe^{3+} + e^- \to Fe^{2+};$ $E^o_{Fe^{3+}/Fe^{2+}} = +0.77 \ V$

Similar Questions

The values of $E^0$ for metals $A$,$B$,and $C$ are $0.34 \ V$,$-0.80 \ V$,and $-0.46 \ V$ respectively. State the correct order for their ability to act as reducing agents.

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What is the standard reduction potential $(E^o)$ for $Fe^{3+} \to Fe$ ? ............... $V$Given that :$Fe^{2+} + 2e^- \to Fe;$ $E^o_{Fe^{2+}/Fe} = -0.47 \ V$$Fe^{3+} + e^- \to Fe^{2+};$ $E^o_{Fe^{3+}/Fe^{2+}} = +0.77 \ V$