Debye Huckel Onsager Equation

Λ^C_m = Λ^O_m – b√c

Λ^C_m =Molar conductivity at any constriction C.

Λ^C_m =Molar conductivity at infinite constriction.

Λ^O_m =Molar conductivity at infinite constriction           

b = Constant

(c)^1/2  = concentration

In case of weak electrolyte, conductance increases with increase in dilution, because dilution causes ionization of weak electrolyte. But it doesn’t reach the infinite or limiting value.

Limitation: - It cannot explain the molar conductivity of weak electrolyte at infinite dilution or limiting value. It is explained by kohlrausch law.