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EMF

For the react...

Question

For the reaction, $F e^{3 +} + 3 e ⇌ F e, E^{o}$ is -0.036 V and the standard electrode potential(SEP) for $F e^{3 +} + e ⇌ F e^{2 +}$ is 0.77 V.
Hence, $E^{o}$ for $F e^{2 +} + 2 e ⇌ F e$ is:

-0.4395 V

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-0.807 V

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0.734 V

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0.807 V

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Solution

The correct option is C -0.807 V
For the reaction, $F e^{3 +} + 3 e ⇌ F e, E^{o}$ is -0.036 V and the standard electrode potential for $F e^{3 +} + e ⇌ F e^{2 +}$ is 0.771 V. $E^{o}$ for $F e^{2 +} + 2 e ⇌ F e$ is $- 0.036 V - 0.771 V = - 0.807 V$ .

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Similar questions

F e^{2 +} + 2 e^{-} \to F e, E^{o} = - 0.440

F e^{3 +} + 3 e^{-} \to F e, E^{o} = - 0.036

(E^{o})

F e^{3 +} + e^{-} \to F e^{2 +}

F e^{2 +} + 2 e^{-}

⟶

F e; E^{o} = - 0.440 V

F e^{3 +} + 3 e^{-}

⟶

F e; E^{o} = - 0.036 V

(E^{o}

F e^{3 +} + e^{-}

\to

F e^{2 +}

{F e}^{3 +} + {3 e}^{-} ⟶ F e; E^{o} = - 0.036 v o l t

{F e}^{2 +} + {2 e}^{-} ⟶ F e; E^{o} = - 0.440 v o l t

E^{o}

{F e}^{3 +} + e^{-} ⟶ {F e}^{2 +}

F e^{2 +} + 2 e \to F e

F e^{3 +} + 3 e \to F e

- 0.440

- 0.036

(E^{0})

F e^{3 +} + e \to F e^{2 +}

Given standard electrode potentials:

$F e^{3 +} + 3 e^{-} \to F e; E^{0} = - 0.036 V$

$F e^{2 +} + 2 e^{-} \to F e; E^{0} = - 0.440 V$

The standard electrode potential $E^{o}$ for $F e^{3 +} + e^{-} \to F e^{2 +}$ is:

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