A 0100 M MgSO₄ Solution Has a Freezing Point of -0

Multiple Choice

A 0.100 m MgSO₄ solution has a freezing point of -0.23 $\degree$ C. What is the van't Hoff factor for this solution? K_f = 1.86 $\degree$ C/m

A) 0.62
B) 1.0
C) 1.2
D) 2.0
E) 4.0