JEE Main 2016 Chemistry question
An aqueous solution of a salt at certain temperature has a Van't Hoff factor of 2. What is the degree of dissociation for this solution of the salt?
Answer: (1)
Solution
The salt dissociates as
MX_2 → M^{2+} + 2X^-,
producing particles from each formula unit. For a degree of dissociation , the van't Hoff factor is
i = 1 + α(n-1) = 1 + 2α.
Setting gives \al$
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