The freezing point depression constant for water is $-1.86^{\circ}\mathrm{C\,m^{-1}}$. If $5.00\,\mathrm{g}\,\mathrm{Na_{2}SO_{4}}$ is dissolved in $45.0\,\mathrm{g}\,\mathrm{H_{2}O}$, the freezing point is changed by $-3.82^{\circ}\mathrm{C}$. Calculate the van't Hoff factor for $\mathrm{Na_{2}SO_{4}}$
- A$0.381$
- B$2.05$
- C$2.63$
- D$3.11$
✓ Correct answer: C
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