Electrolysis of molten NaCl gives sodium at cathode while aqueous NaCl gives H₂ gas at cathode.

Solution

Molten NaCl dissociates to give Na⁺ and Cl^-, Na⁺ then move towards cathode, picks up one electron and gets reduced to form Na.

Na⁺ +e^- ---> Na

In aqueous NaCl, as ^{$E_{\frac{H^{+}}{H_{2}}}^{0} > E_{\frac{{Na}^{+}}{Na}}^{0}$} , it is the hydrogen gas which liberates at cathode.

$2 H^{+} + 2 e^{-} \to H_{2}$

Some More Questions From Electrochemistry Chapter

Why does the conductivity of a solution decrease with dilution?

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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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Electrochemistry

Electrolysis of molten NaCl gives sodium at cathode while aqueous NaCl gives H₂ gas at cathode.

Some More Questions From Electrochemistry Chapter

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^–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.

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

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What is the quantity of electricity in coulombs needed to reduce 1 mol of Cr₂O₇^2-?

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For Daily Free Study Material Join wiredfaculty

Electrochemistry

Electrolysis of molten NaCl gives sodium at cathode while aqueous NaCl gives H2 gas at cathode.

Some More Questions From Electrochemistry Chapter

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.

Consider the reaction: Cr2O72– + 14H+ + 6e- → 2Cr3+ + 8H2OWhat is the quantity of electricity in coulombs needed to reduce 1 mol of Cr2O72-?

Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Electrolysis of molten NaCl gives sodium at cathode while aqueous NaCl gives H₂ gas at cathode.

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.

Consider the reaction: Cr₂O₇^2– + 14H⁺ + 6e- → 2Cr³⁺ + 8H₂O
What is the quantity of electricity in coulombs needed to reduce 1 mol of Cr₂O₇^2-?