An aqueous solution of a salt `MX_(2)` at certain temperature has a van'f Hoff factor of 2. The degree of dissociation for this solution of the salt is:

Options

A. 0.5
B. 0.33
C. 0.67
D. 0.8

Answer

A

Explanation

Van.t Hoff factor (i) `=("No. of particles after association or dissociation")/("No. of particles before association or dissociatio")`

Total no. of particles `=1-alpha + alpha + 2alpha = 1 + 2alpha`
`:.i=(1 + 2alpha)/1 = 2`
`:.alpha = 0.50 or 50%`.