Discussion
The limiting equivalent conductance of a weak acid cannot be found by extrapolation because its equivalent conductance
Answer: A
Correct answer: rises steeply and without limit near infinite dilution
A strong electrolyte’s equivalent conductance varies linearly with the square root of concentration and can be extrapolated to zero. A weak electrolyte is barely dissociated at measurable concentrations and approaches complete dissociation only asymptotically, so its curve turns sharply upward near the axis and no extrapolation is possible. Kohlrausch’s law of independent migration supplies the limiting value instead.
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