Given that E-Cu2-Cu-0-337 V and E-Cu-Cu2-0-153 V-then calculate E-Cu-Cu-

1st half cell Cu^2++2e^+→ Cu..(1);and E_1^∘=0.337 V 2nd half cell Cu^+→ Cu^2++e^ ..(2);and E_2^∘= 0.153 V 3rd half cell Cu^++e^ → Cu...(3); and E_3^∘=? Adding ( ...

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Byju's Answer

Standard XII

Chemistry

Faraday's First Law

Given that E∘...

Question

Given that $E_{C u^{2 +} / C u}^{\circ} = 0.337 V and E_{C u^{+} / C u^{2 +}}^{\circ} = - 0.153 V$ ,then calculate $E_{C u^{+} / C u}^{\circ}$ :

+ 0.184

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- 0.184

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+ 0.521

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- 0.521

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Solution

The correct option is C $+ 0.521$
1st half cell
$C u^{2 +} + 2 e^{+} \to C u . . (1); and E_{1}^{\circ} = 0.337 V$
2nd half cell
$C u^{+} \to C u^{2 +} + e^{-} . . (2); and E_{2}^{\circ} = - 0.153 V$
3rd half cell
$C u^{+} + e^{-} \to C u . . . (3); and E_{3}^{\circ} = ?$
Adding (1) and (2)
So, $Δ G_{3}^{\circ} = Δ G_{1}^{\circ} + Δ G_{2}^{\circ}$
$\Rightarrow - n_{3} F E_{3}^{\circ} = - n_{1} F E_{1}^{\circ} + (- n_{2} F E_{2}^{\circ})$
$\Rightarrow E_{3}^{\circ} = \frac{- n_{1} F E_{1}^{\circ} + (- n_{2} F E_{2}^{\circ})}{- n_{3} F}$
$\Rightarrow E_{3}^{\circ} = \frac{- F (2 E_{1}^{\circ} + E_{2}^{\circ})}{- F}$
$\Rightarrow E_{3}^{\circ} = 2 E_{1}^{\circ} + E_{2}^{\circ}$
$\Rightarrow E_{3}^{\circ} = 2 \times 0.337 - 0.153$
$\Rightarrow E_{3}^{\circ} = 0.674 - 0.153$

$\Rightarrow E_{3}^{\circ} = 0.521 V$

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Similar questions

Q. Given,

C u^{2 +} + 2 e^{-} \to C u; E^{o} = 0.337

C u^{2 +} + e^{-} \to C u^{+}; E^{o} = - 0.153

E^{o}

value for the reaction,

C u^{+} + e \to C u

will be:

Q. Given:
(i)

C u^{2 +} + 2 e^{-} \to C u, E^{\circ} = 0.337 V

(ii)

C u^{2 +} + e^{-} \to C u^{+}, E^{\circ} = 0.153 V

Electrode potential,

E^{\circ}

for the reaction,

C u^{+} + e^{-} \to C u

, will be

Q. Given that the standard potential (

E^{\circ}

) of

C u^{2 +} / C u

and

C u^{+} / C u

are

0.340 V

and

0.522 V

respectively. The

E^{\circ}

C u^{2 +} / C u^{+}

is:

Q. Given:

C u^{2 +} + e^{-} \to C u^{+}; E^{\circ} = 0.15 v o l t

C u^{+} + e^{-} \to C u; E^{\circ} = 0.5 v o l t

Calculate potential for

C u^{2 +} + 2 e^{-} \to C u

Q. The standard reduction potentials of

C u^{2 +} / C u

and

C u^{2 +} / C u^{+}

are

0.337 V

and

0.153 V

respectively. The standard electrode potential of

C u^{+} / C u

half-cell is:

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Given that E∘Cu2+/Cu=0.337 V and E∘Cu+/Cu2+=−0.153 V,then calculate E∘Cu+/Cu:

Given that $E_{C u^{2 +} / C u}^{\circ} = 0.337 V and E_{C u^{+} / C u^{2 +}}^{\circ} = - 0.153 V$ ,then calculate $E_{C u^{+} / C u}^{\circ}$ :