Write a Nernst equation for the half-cell reaction: Mⁿ⁺(aq) + ne^– → M(s)

Solution

The concentration of all species involved in the species involved in the electrode reaction is unity.This need not be always true.
Nernst shows that for the electrode reaction:
$M^{n +} (aq) + {ne}^{-} \to M (s)$
the electrode potential at any concentration measured with respect to standard hydrogen electrode can be represented by:
$E_{\frac{(M^{n +}}{M})} = E_{\frac{M^{n +}}{M}}^{0} - \frac{RT}{nF} In \frac{M}{M^{n +}}$

but concentration of solid M is taken as unity as we have
$E_{\frac{(M^{n +}}{M})} = E_{\frac{M^{n +}}{M}}^{0} - \frac{RT}{nF} In \frac{1}{M^{n +}}$

R is gas constant (8.314 JK^–1 mol^–1),
F is Faraday constant (96487 C mol^–1), T is temperature in kelvin and [Mⁿ⁺] is the concentration of the species.

Some More Questions From Electrochemistry Chapter

The molar conductivity of 0.025 mol L^–1methanoic acid is 46.1 S cm² mol^–1. Calculate its degree of dissociation and dissociation constant. Give λ°(H⁺) = 349.6 S cm²mol^–1 and λ° (HCOO^– ) = 54.6 s cm² mol^–1.

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Electrochemistry

Write a Nernst equation for the half-cell reaction: Mⁿ⁺(aq) + ne^– → M(s)

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The molar conductivity of 0.025 mol L^–1methanoic acid is 46.1 S cm² mol^–1. Calculate its degree of dissociation and dissociation constant. Give λ°(H⁺) = 349.6 S cm²mol^–1 and λ° (HCOO^– ) = 54.6 s cm² mol^–1.

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For Daily Free Study Material Join wiredfaculty

Electrochemistry

Write a Nernst equation for the half-cell reaction: Mn+(aq) + ne– → M(s)

Some More Questions From Electrochemistry Chapter

Can you store copper sulphate solutions in a Zinc pot?

Why does the conductivity of a solution decrease with dilution?

Suggest a way to determine the Λ°m value of water.

The molar conductivity of 0.025 mol L–1 methanoic acid is 46.1 S cm2 mol–1. Calculate its degree of dissociation and dissociation constant. Give λ°(H+) = 349.6 S cm2 mol–1 and λ° (HCOO– ) = 54.6 s cm2 mol–1.

If the current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons flow through the wire?

Suggest a list of metals that are extracted electrolytically.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Write a Nernst equation for the half-cell reaction: Mⁿ⁺(aq) + ne^– → M(s)

Suggest a way to determine the Λ°_m value of water.

The molar conductivity of 0.025 mol L^–1methanoic acid is 46.1 S cm² mol^–1. Calculate its degree of dissociation and dissociation constant. Give λ°(H⁺) = 349.6 S cm²mol^–1 and λ° (HCOO^– ) = 54.6 s cm² mol^–1.