Question

 At 298 K, the limited molar conductivities at infinite dilution of sodium benzoate, hydrochloric acid and sodium chloride are 8.24 × 10⁻³ S m² mol⁻¹, 4.26 × 10⁻² S m² mol⁻¹ and 1.26 × 10⁻² S m² mol⁻¹, respectively. Calculate the limiting molar conductivity of aqueous benzoic acid. 

22 Aug 2025
Answer :
Word Count : 498
Electrolyte conductance at infinite dilution is governed by Kohlrausch’s law of independent ionic migration, which states that the limiting molar conductivity (Λ°) of an electrolyte equals the sum of the individual contributions of its constituent ions, each contribution depending only on the ion and the solvent at a given temperature. Practically, this lets us build the Λ° of a target electrolyte by combining tabulated Λ° values of other electrolytes that share the same ions and then cancelling spectator ions algebraically. For weak electrolytes ____ ________ _________ ____ ________ ______ __________ _______ ____ ____ _______.
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