Question

Which compound corresponds vant Hoff factor (i) to be equal to 2 in dilute solution:
A. `K_(2) SO_(4)`
B. `NaHSO_(4)`
C. Sugar
D. `MgSO_(4)`

Answer 1

Correct Answer - D
i=2 for `MgSO_(4)` as it will lead two ions on complete dissociation.
`MgSO_(4) hArr Mg^(2+) + SO_(4)^(-) - (2)`
`K_(2)SO_(4) hArr 2K^(+) + SO_(4)^(-) - (3)`
`NaHSO_(4) hArr Na^(+) + H^(+) + SO_(4)^(-) - (3)`
Sugar rarr sugar (Undissociated)