According to Kohlrausch's law "At infinite dilution, each ion makes definite contribution to molar conductance of an electrolyte whatever be the nature of the other ion of the electrolyte" Λm∞=λ+∞+λ−∞ λ+∞‌ and ‌λ−∞ are molar ionic conductance at infinite dilution for cations and anions, respectively.