Q.The value of $K_f$ for water is $1.86 \text{ K kg mol}^{-1}$ . If $5.0 \text{ g}$ of $Na_2SO_4$ is dissolved in $45.0 \text{ g}$ of $H_2O$ , the freezing point is changed by $-3.82^{\circ}C$ . The Van't Hoff factor for $Na_2SO_4$ is:

2.05

2.63

3.11

0.38

The correct solution involves applying the fundamental concept to derive the final value step by step...

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