The ionization constant of a weak electrolyte is 25×10−6 and the equivalent conductance of its 0.01 M solution is 19.6 S cm2 eq−1. The equivalent conductance at infinite dilution of the electrolyte in S cm2 eq−1 is

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250

196

392

384

answer is C.

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Detailed Solution

HA C⇌ H+ 0+A−0C−Cα Cα CαOr K=Cα2 25×10−6=10−2.α2 α=5×10−2Also α=λvλ∞=19.6λ∞ λ∞=19.65×10−2=392