The **degree of dissociation** $\alpha$ of a weak electrolyte is related to its molar conductivity by:
A$\alpha = \Lambda_0 / \Lambda_c$
B$\alpha = \Lambda_c / \Lambda_0$
C$\alpha = \Lambda_c - \Lambda_0$
D$\alpha = \Lambda_c \cdot \Lambda_0$
Answer & Solution
Correct answer: B. $\alpha = \Lambda_c / \Lambda_0$
$\alpha = \Lambda_c / \Lambda_0$ — degree of dissociation equals the molar conductivity at concentration $c$ divided by the value at infinite dilution. Powerful for finding $\alpha$ from a single conductivity measurement.
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