In the determination of molar mass of `A^(+) B ^(-)` using a colligative property, what may be the value of van't Hoff factor if the solute is `50%` dissociates ?

Options

A. `0.5`
B. `1.5`
C. `2.5`
D. `1`

Answer

B

Explanation

`alpha = (I -1)/( n -1) =0.5`
`(i-1)/(2-1) =0.5`
`I -1 =0.5`
`therefore I =0.5 +1=1.5`