Consider the following half cellsCus- Cu2-aq - 2e- - Eo - -0-325 VCu-aq - e- - Cus - Eo - 0-50 VThe Eo for the reaction 2Cu-aq- Cu2-aq - Cus is

(1) Cu_(s)→ Cu^2+_(aq) + 2e^ ; E^∘_1 = 0.325 V (2) Cu^+_(aq)+ e^ → Cu_(s) ; E^∘_2 = 0.50 V The required reaction is: nbsp;2Cu^+_(aq)→ Cu^2+_(aq) + Cu_ ...

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Byju's Answer

Standard XIII

Chemistry

EMF

Consider the ...

Question

Consider the following half cells
$C u_{(s)} \to C u_{(a q)}^{2 +} + 2 e^{-}; E^{o} = - 0.325 V$
$C u_{(a q)}^{+} + e^{-} \to C u_{(s)}; E^{o} = 0.50 V$
The $E^{o}$ for the reaction $2 C u_{(a q)}^{+} \to C u_{(a q)}^{2 +} + C u_{(s)}$ is

0.175 V

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0.35 V

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0.675 V

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0.3375 V

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Solution

The correct option is A 0.175 V
(1) $C u_{(s)} \to C u_{(a q)}^{2 +} + 2 e^{-}; E_{1}^{\circ} = - 0.325 V$
(2) $C u_{(a q)}^{+} + e^{-} \to C u_{(s)}; E_{2}^{\circ} = 0.50 V$

The required reaction is: $2 C u_{(a q)}^{+} \to C u_{(a q)}^{2 +} + C u_{(s)}$

We need to combine the two above mentioned reactions so as to form the final reaction and the resultant standard EMF will be a summation of the $E^{o}$ of the combining reactions.

$E_{3}^{\circ} = - 0.325 + 0.5 = 0.175 V$

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Similar questions

Q. Consider the following half cells

C u_{(s)} \to C u_{(a q)}^{2 +} + 2 e^{-}; E^{o} = - 0.325 V

C u_{(a q)}^{+} + e^{-} \to C u_{(s)}; E^{o} = 0.50 V

The

E^{o}

for the reaction

2 C u_{(a q)}^{+} \to C u_{(a q)}^{2 +} + C u_{(s)}

Q. The equilibrium constant of the reaction;

C u (s) + 2 {A g}^{+} (a q) ⟶ {C u}^{2 +} (a q) + 2 A g (s)

E^{o} = 0.46 V

298 K

{C u}^{+} (a q)

is unstable in solution and undergoes simultaneous oxidation and reduction, according to the reaction:

2 {C u}^{+} (a q) ⇌ {C u}^{2 +} (a q) + C u (s)

choose correct

E^{o}

for above reaction if

E_{{C u}^{2 +} / C u}^{o} = 0.34 V

and

E_{{C u}^{2 +} / {C u}^{+}}^{o} = 0.15 V

E^{o}

values for the half cell reactions are given:

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

;

E^{o} = 0.15

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

;

E^{o} = 0.34

V
What will be the

E^{o}

of the half-cell:

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

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:

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Consider the following half cells Cu(s)→Cu2+(aq)+2e− ; Eo=−0.325 V Cu+(aq)+e−→Cu(s) ; Eo=0.50 V The Eo for the reaction 2Cu+(aq)→Cu2+(aq)+Cu(s) is

Consider the following half cells
$C u_{(s)} \to C u_{(a q)}^{2 +} + 2 e^{-}; E^{o} = - 0.325 V$
$C u_{(a q)}^{+} + e^{-} \to C u_{(s)}; E^{o} = 0.50 V$
The $E^{o}$ for the reaction $2 C u_{(a q)}^{+} \to C u_{(a q)}^{2 +} + C u_{(s)}$ is