Class 12 Chemistry Electrochemistry Molar conductivity

Molar conductivity

  • It is denoted by the symbol. It is related to the conductivity of the solution by the following equation:

  • The units of is S m2 mol-1.

 

Problem:

The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 Scm-1. Calculate its molar conductivity.

Solution:

k = 0.0248 S cm - 1

c = 0.20 M

Molar conductivity,Λm =  (k x 1000) / c

= 0.0248 x1000 / 0.20

= 124 Scm2 mol - 1

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