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Dear Student The EMF of the Cell, E0 = 0.46 V The cell reaction is: Cu (s) + 2Ag+ (aq) — gt; Cu2+ (aq) + 2Ag (s) The half cell reactions are: 2Ag+ + 2 ...

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Byju's Answer

Standard XII

Chemistry

Secondary Cells

Solve n...

Question

Solve

The e.m.f. of the cell
$C u (s) |C u^{2 +} (a q) ∥ A g^{+} (a q)| A g (s) i s 0.46 V . T h e s \tan d a r d r e d u c t i o n p o t e n t i a l o f A g^{+} / A g i s 0.50 V . T h e s \tan d a r d r e d u c t i o n p o t e n t i a l o f C u^{2 +} Ι C u w i l l b e a) - 0.34 V b) 1.26 V c) - 1.26 V d) 0.34 V$

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Solution

Dear Student

The EMF of the Cell, E⁰ = 0.46 V

The cell reaction is:

Cu (s) + 2Ag⁺ (aq) ----> Cu²⁺ (aq) + 2Ag (s)

The half-cell reactions are:

2Ag⁺ + 2e^- ---> 2Ag (s)

Cu (s) ------> Cu²⁺ (aq) + 2e^-

Standard Reduction Potential of Ag⁺/ Ag = - 0.80 V

[Note: The value of E^o_Ag+/Ag should be +0.80 V, and because they have said reduction potential, then value becomes - 0.80 V]

The question has a printing mistake.

Therefore, E^o_cell = E^o_right- E^o_left

= E^o_Ag⁺_/Ag - E^o_Cu²⁺/Cu

Thus, 0.46 V = - 0.80 V - E^o_Cu²⁺/Cu

Hence, E^o_Cu²⁺/Cu = (-0.80 - 0.46) V = -1.26 V

Regards

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Similar questions

Q. E.M.F. of the cell reaction,

2 A g^{+} + C u ⟶ 2 A g + C u^{2 +}

is 0.46 V. If

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

is 0.34 V,

E_{{A g}^{+} / A g}

is:

Q. The standard reduction potential of

C u^{2 +} (a q)

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. What is the oxidation potential of Cu(s)?

Consider the cell:

Z n | Z n^{2 +} (a q) (1.0 M) | | C u^{2 +} (a q) (1.0 M) | | C u

The standard reduction potential are

0.350

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C u^{2 +} (a q) + 2 e^{-} \to C u

and

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The cell reaction is:

Q. The standard reduction potentials of

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and

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are

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and

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half-cell is:

N i | N i^{2 +} | | C u^{2 +} | C u

The standard EMF of the above cell is 0.59 V. The standard electrode potential (reduction potential) of the copper electrode is 0.34 V. Calculate the standard electrode potential of nickel electrode.

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Solve The e.m.f. of the cell Cu(s) Cu2+aq ∥Ag+ (aq) Ag(s)is 0.46 V. The standard reduction potential of Ag+/Ag is 0.50 V. The standard reduction potential of Cu2+Ι Cu will bea) -0.34 V b) 1.26 Vc) -1.26 V d) 0.34 V