CBSE Class 12 · 2003 · Delhi Compartment · Redox Reactions and ElectrochemistryVery Short Answer

How does the molar conductivity of KCl solution vary with increasing concentration?

Answer: It decreases (slowly, as √c) with increasing concentration — KCl being a strong electrolyte.

Solution

KCl is a strong electrolyte. As concentration increases, interionic attractions retard the ions, so the molar conductivity decreases — slowly and linearly with

c

(Debye–Hückel–Onsager behaviour):

Λ_{m} = Λ_{m}^{\circ} - A c

CBSE Class 12 Board · 2003 · Delhi Compartment · Subjective

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