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For a weak electrolyte at concentration c, the degree of dissociation α can be approximated as:
Aα = Λ°_m / Λ_m
Bα = Λ_m × Λ°_m
Cα = Λ_m − Λ°_m
Dα = Λ_m / Λ°_m
Answer & Solution
Correct answer: D. α = Λ_m / Λ°_m
**α = Λ_m / Λ°_m**. At infinite dilution α → 1 and Λ_m → Λ°_m. The acid dissociation constant follows: K_a = cα²/(1−α).
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