MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Reactivity with Halogens and Hydrogen (Group 2)

In a cell, th...

Question

In a cell, the following reactions take place
$F e^{2 +} \to F e^{3 +} + e^{-} E_{F e^{3 +} / F e^{2 +}}^{\circ} = 0.77 V$
$2 I^{-} \to I_{2} + 2 e^{-} E_{I_{2} / I^{-}}^{\circ} = 0.54 V$

The standard electrode potential for the spontaneous reaction in the cell is $x \times 10^{- 2} V$ at 208 K. The value of $x$ is (Nearest Integer)

Open in App

Solution

$F e^{2 +} \to F e^{3 +} + e^{-} E_{F e^{3 +} / F e^{2 +}}^{\circ} = 0.77 V$
$2 I^{-} \to I_{2} + 2 e^{-} E_{I_{2} / I^{-}}^{\circ} = 0.54 V$
The cell reaction is,
$2 F e^{2 +} + I_{2} \to 2 F e^{3 +} + 2 I^{-}$

$E_{c e l l}^{\circ} = E_{c a t h o d e}^{\circ} - E_{a n o d e}^{\circ}$
$= 0.77 - 0.54$
$= 0.23 V$
$= 23 \times 10^{- 2} V$

Suggest Corrections

thumbs-up

18

Similar questions

Q. 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}

F e^{2 +} + 2 e ⇌ F e

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})

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

Q. The standard reduction potentials for the following reactions are:

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

E^{\circ} = - 0.036 V

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

E^{\circ} = - 0.44 V

What would be the standard electrode potential for the reaction

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

?

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})

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

Q. For the reaction,

F e^{3 +} + 3 e^{-} ⇌ F e, E^{\circ}

- 0.036 v o l t

and the standard electrode potential for

F e^{3 +} + e^{-} ⇌ F e^{2 +}

0.771 v o l t

. Calculate the

E^{\circ}

F e^{2 +} + 2 e^{-} ⇌ F e

.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Group 2 Chemical Properties

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Reactivity with Halogens and Hydrogen (Group 2)

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon