Kohlrausch's law definition

Kohlrausch's law of indendent migration of ions states that the molar conductance of infinite dilution (limiting molar conductivity ) is the sum of the individual contributions of the anions and cations of the electrolyte.

It can be given in the mathematical form as:
λ0M = v+λ0+ + v-λ0-
λ0+ and λ0- are the limiting molar conductivity of cation and anion respectively.
For NaCl,
λ0M = λ0Na+ + λ0Cl-
And for Al2(SO4)3,
λ0 Al2(SO4)3 =2 λ0Al3+ + λ0SO4 2-

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