A 0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell is 0.367 cm^–1, find out the specific and molar conductance of the sodium hydroxide solution.

Solution

(i) Resistance (k) = $3.16 Ω$
Conductance (C) = $\frac{1}{R}$
= $\frac{1}{3.16 ohm} = 0.0316 {ohm}^{- 1}$
Specific conductance (k)
= Conductance x cell constant
$= 0.0316 {ohm}^{- 1} \times 0.367 {cm}^{- 1} = 0.0116 {ohm}^{-} {cm}^{- 1}$
(ii) Molar conductance (C)
$= 0.05 M = 0.05 mol L^{- 1} = \frac{0.05 mol}{1 L} = \frac{0.05 mol}{10^{3} {cm}^{3}} = 0.05 \times 10^{- 3} mol {cm}^{- 3}$
Molar conductance $(Λ_{m})$
$= \frac{k}{C} = \frac{(0.0116 {ohm}^{- 1} {cm}^{- 1})}{(0.05 \times 10^{- 3} mol {cm}^{- 3})} = 232 {ohm}^{- 1} {cm}^{2} {mol}^{- 1} .$

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Electrochemistry

A 0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell is 0.367 cm^–1, find out the specific and molar conductance of the sodium hydroxide solution.

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Electrochemistry

A 0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell is 0.367 cm–1, find out the specific and molar conductance of the sodium hydroxide solution.

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.

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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

A 0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell is 0.367 cm^–1, find out the specific and molar conductance of the sodium hydroxide solution.

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-?