Discussion
The degree of dissociation of a weak electrolyte is estimated as the ratio of its equivalent conductance at the given concentration to its value at
Answer: B
Correct answer: infinite dilution
At infinite dilution the electrolyte is completely dissociated, so the equivalent conductance there represents all the solute conducting. The ratio
\[ \alpha = \frac{\Lambda_c}{\Lambda^\circ} \]therefore gives the fraction actually dissociated at the concentration measured, and from it the dissociation constant follows through Ostwald’s dilution law.
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