Given standard electrode potentials Fe-2e- - Fe- E- -0-440 VFe-3e- - Fe - E-0-036 VThe standard electrode potential E- for Fe-e- - Fe- is

Δ G^∘ = nE^∘ F Fe^2+ + 2e^ → Fe .......(i) Δ G^∘ = 2 × F × ( 0.440 V)= 0.880 F Fe^3++3e^ → Fe ......(ii) Δ G^∘= 3× F× ( 0.036 ...

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Standard XIII

Chemistry

Gibb's Energy and Nernst Equation

Given standar...

Question

Given standard electrode potentials
$F e^{+ +} + 2 e^{-} \to F e; E^{\circ} = - 0.440 V$
$F e^{+ + +} + 3 e^{-} \to F e; E^{\circ} = - 0.036 V$
The standard electrode potential $(E^{\circ})$ for $F e^{+ + +} + e^{-} \to F e^{+ +}$ is

- 0.476 V

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- 0.404 V

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+ 0.404 V

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+ 0.772 V

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Solution

The correct option is D
+ 0.772 V

$Δ G^{\circ} = - n E^{\circ} F$
$F e^{2 +} + 2 e^{-} \to F e$ $. . . . . . . (i)$
$Δ G^{\circ} = - 2 \times F \times (- 0.440 V) = 0.880 F$
$F e^{3 +} + 3 e^{-} \to F e$ $. . . . . . (i i)$
$Δ G^{\circ} = - 3 \times F \times (- 0.036) = 0.108 F$
On substracting equation $(i)$ from $(i i)$
$F e^{3 +} + e^{-} \to F e^{2 +}$
$Δ G^{\circ} = 0.108 F - 0.880 F = - 0.772 F$
$E^{\circ}$ for the reaction $= - \frac{Δ G^{\circ}}{n F} = - \frac{(- 0.772 F)}{1 \times F} = + 0.772 V$

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Similar questions

Given standard electrode potentials
$F e^{+ +} + 2 e^{-} \to F e; E^{\circ} = - 0.440 V$
$F e^{+ + +} + 3 e^{-} \to F e; E^{\circ} = - 0.036 V$
The standard electrode potential $(E^{\circ})$ for $F e^{+ + +} + e^{-} \to F e^{+ +}$ is

Q. Given, standard electrode potentials,

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

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

The standard electrode potential

(E^{o})

for

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

is:

Q. Given standard electrode potentials,

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

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

The standard electrode potential

(E^{\circ})

for

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

is:

Q. Given, standard electrode potentials:

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

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

The standard electrode potential

E^{\circ}

for

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

is:

Q. Given standerd electrode potentials

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

⟶

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

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

⟶

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

The standard electrode potential

(E^{o}

) for

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

\to

F e^{2 +}

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Given standard electrode potentials Fe+++2e−→Fe; E∘=−0.440 V Fe++++3e−→Fe; E∘=−0.036 V The standard electrode potential (E∘) for Fe++++e−→Fe++ is

Given standard electrode potentials
$F e^{+ +} + 2 e^{-} \to F e; E^{\circ} = - 0.440 V$
$F e^{+ + +} + 3 e^{-} \to F e; E^{\circ} = - 0.036 V$
The standard electrode potential $(E^{\circ})$ for $F e^{+ + +} + e^{-} \to F e^{+ +}$ is