2 Variation of
Conductivity
and Molar
Conductivity
with
Concentration
Rationalised 2023-24
47
Electrochemistry
platinum electrodes with unit area of cross section and at a distance
of unit length This is clear from the equation:
 = 
A = 
G


l
 (both A and l are unity in their appropriate units in
m or cm)
Molar conductivity of a solution at a given concentration is the
conductance of the volume V of solution containing one mole of
electrolyte kept between two electrodes with area of cross section A and
distance of unit length Therefore,
κ
Λ
κ
=
=
m
A
l
Since l = 1 and A = V ( volume containing 1 mole of electrolyte)
Lm = k V
(2 22)
Molar conductivity increases with
decrease in concentration