Standard electrode potential of two half-reactions are given below- Fe2- Fe- E- - -0-44 V Fe3- Fe2- E- - -0-77 VIf Fe2- Fe3- and Fe are kept together -

The correct option is B the concentration of Fe^3+ decreasesAs, Fe^3+⇌ Fe^2+; #160; #160; #160; #160; #160; #160; #160;E^∘ = ...

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Byju's Answer

Standard XII

Chemistry

Gibb's Energy and Nernst Equation

Standard elec...

Question

Standard electrode potential of two half-reactions are given below:
$F e^{2 +} ⇌ F e; E^{\circ} = - 0.44 V$
$F e^{3 +} ⇌ F e^{2 +}; E^{\circ} = + 0.77 V$
If $F e^{2 +}, F e^{3 +}$ and $F e$ are kept together :

the concentration of

F e^{3 +}

increases

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the concentration of

F e^{3 +}

decreases

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the mass of

F e

increases

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the concentration of

F e^{2 +}

decreases

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Solution

The correct option is B the concentration of $F e^{3 +}$ decreases
As, $F e^{3 +} ⇌ F e^{2 +}; E^{\circ} = + 0.77 V$ it has positive value of emf so it is spontaneous reaction and $F e^{3 +}$ converts into $F e^{2 +}$ and $F e^{3 +}$ concentration decreases but $F e^{2 +}$ concentration increases.

Option B is correct.

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Similar questions

Q. Standard electrode potentials are:

F e^{2 +} / F e (E^{o} = - 0.44 V), F e^{3 +} / F e^{2 +} (E^{o} = 0.77 V)

F e^{2 +}, F e^{3 +}

and

F e

blocks are kept together, then:

Q. Standard electrode potentials of

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

and

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

are

- 0.440

V and

- 0.036

V respectively. The standard electrode potential

(E^{0})

for

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

is:

Q. Given

E_{F e^{2 +} | F e}^{⊖}

and

E_{F e^{3 +} | F e^{2 +}}^{⊖}

are -0.44 and 0.77 V respectively.
If

F e^{2 +}, F e^{3 +}

, and

F e

blocks are kept together, then:

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. Standard electrode potentials of

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

and

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

are

- 0.440 V

and

- 0.036 V

respectively. The standard electrode potential

(E^{o})

for

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

is:

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Standard electrode potential of two half-reactions are given below:Fe2+⇌Fe;E∘=−0.44 VFe3+⇌Fe2+;E∘=+0.77 VIf Fe2+, Fe3+ and Fe are kept together :

The correct option is B the concentration of Fe3+ decreasesAs, Fe3+⇌Fe2+;E∘=+0.77 V it has positive value of emf so it is spontaneous reaction and Fe3+ converts into Fe2+ and Fe3+ concentration decreases but Fe2+ concentration increases.Option B is correct.

Standard electrode potential of two half-reactions are given below:
$F e^{2 +} ⇌ F e; E^{\circ} = - 0.44 V$
$F e^{3 +} ⇌ F e^{2 +}; E^{\circ} = + 0.77 V$
If $F e^{2 +}, F e^{3 +}$ and $F e$ are kept together :