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Standard XII

Chemistry

Electrolysis and Electrolytes

In the electr...

Question

In the electrochemical cell $H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following is the correct value of reduction potential?

1.10 V

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0.110 V

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1.50 V

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0.220 V

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Solution

The correct option is A 1.10 V
$E_{c e l l} = E_{c e l l}^{\circ} - \frac{R T}{n F} l n [\frac{(Z n^{2 +})}{(C u^{2})}]$

$= 1.1 - \frac{R T}{n T} l n (\frac{0.1}{0.1})$

$E_{c e l l} = 1.1$ V

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Similar questions

In the electrochemical cell $P t (s) | H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following statements is true?

E_{1}, E_{2}, E_{3}

are the emf values of the three galvanic cells respectively.
(i)

Z n | Z n_{1 M}^{2 +} | | C u_{0.1 M}^{2 +} | C u

(ii)

Z n | Z n_{1 M}^{2 +} | | C u_{1 M}^{2 +} | C u

(iii)

Z n | Z n_{0.1 M}^{2 +} | | C u_{1 M}^{2 +} | C u

Which one of the following is true?

Q. The emf of the following three galvanic cells are represented by

E_{1}, E_{2}

and

E_{3}

respectively. Which of the following is correct?

(i)

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u

(ii)

Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u

(iii)

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u

Q. The EMF of the following cells are:

C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{0} = 0.46 V

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{0} = 1.10 V

The EMF of the cell

Z n | Z n^{2 +} (1 M) | | A g^{+} (1 M) | A g

will be:

Q. The emf

(E^{\circ})

of the following cells are:

A g / A g^{+} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = - 0.46 v o l t

Z n / Z n^{2 +} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = + 1.10 v o l t

Calculate the emf of the cell:

Z n | Z n^{2 +} (1 M) ∥ A g^{+} (1 M) | A g

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In the electrochemical cell H2(g),1atm|H+(1M)||Cu2+(1M)|Cu(s), which one of the following is the correct value of reduction potential?

The correct option is A 1.10 VEcell=E∘cell−RTnFln[(Zn2+)(Cu2)]=1.1−RTnTln(0.10.1)Ecell=1.1 V

In the electrochemical cell $H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following is the correct value of reduction potential?

The correct option is A 1.10 V
$E_{c e l l} = E_{c e l l}^{\circ} - \frac{R T}{n F} l n [\frac{(Z n^{2 +})}{(C u^{2})}]$

$= 1.1 - \frac{R T}{n T} l n (\frac{0.1}{0.1})$

$E_{c e l l} = 1.1$ V