# Solution - Conductance of Electrolytic Solutions - Variation of Conductivity and Molar Conductivity with Concentration

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#### Question

State Kohlrausch Law and write mathematical expression of molar conductivity of the given solution at infinite dilution.

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The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below:

 Concentration/M 0.001 0.01 0.02 0.05 0.1 102 × κ/S m–1 1.237 11.85 23.15 55.53 106.74

Calculate Lambda_m for all concentrations and draw a plot between Lambda_m and c^(1/2) Find the value of Lambda_m^0

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The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm−1. Calculate its molar conductivity.

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Define the following terms:

Molar conductivity (m)

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The conductivity of 0.20 mol L−1 solution of KCl is 2.48 × 10−2 S cm−1. Calculate its molar conductivity and degree of dissociation (α). Given λ0 (K+) = 73.5 S cm2 mol−1 and λ0 (C1) = 76.5 S cm2 mol−1.

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State Kohlrausch’s law of independent migration of ions.

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#### Reference Material

Solution for concept: Conductance of Electrolytic Solutions - Variation of Conductivity and Molar Conductivity with Concentration. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), 12th HSC Science (Computer Science), 12th HSC Science (Electronics), 12th HSC Science (General) , 12th ISC (Arts), 12th ISC (Commerce), 12th ISC (Science), PUC Karnataka Science
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