CBSE Class 12-science Answered

Conductivity of a solution is equal to the conductance of a solution of 1cm length and cross section area of 1 square cm. It is represented by symbol Kappa (K ).

K = 1/ ?

Where, ? = resistivity.

The unit of K is ohm^-1 cm^-1 or S cm^-1

It depends on the concentration of the electrolyte, nature of solvent and temperature.

Molar conductivity of a solution is the conductance of the volume V of solution containing one mole of electrolyte placed between two electrodes with an area of cross section A and distance of unit length.

?_m = K /c

Where, k =conductivity and c= electrolyte concentration.

It increases with the decrease in concentration.