The cell constant is given by the equation:
Cell constant = G* = conductivity × resistance
= 1 29 S/m × 100 W = 129 m–1 = 1 29 cm–1
Conductivity of 0 02 mol L–1  KCl solution = cell constant / resistance
=
G*
R = 
129 m–1
 
520 
= 0