Class 12th Chemistry 2017 Set1 Delhi Board Paper Solution
Calculate the degree of dissociation (α) acetic acid if its molar conductivity (Λm) is 39.05 S cm2/mol-1
Given λ0H+ = 349.6 S cm2mol-1 and λ0(CH3COO-) = 40.9 S cm2mol-1
The degree of dissociation is give by the following relation:
α = Λm / Λo
Where α is the degree of dissociation, Λm is the molar conductivity and Λo is the molar conductivity at infinite dilution.
We have given
λ0H+ = 349.6 S cm2mol-1
and
λ0(CH3COO-) = 40.9 S cm2mol-1
then,
λ0CH3COOH = 349.6 + 40.9 = 390.5
Now, degree of dissociation (α) is:
= 39.05 / 390.5
= 0.1
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