Colligative Properties

Step 1: Calculate van't Hoff factors.
NaCl dissociates into Na and Cl : .
Sucrose does not dissociate: .
Step 2: Compute effective moles of particles.
NaCl contributes: mol particles.
Sucrose contributes: mol particles.
Total effective moles = mol.
Step 3: Convert solvent mass to kg.
200 g water = 0.2 kg.
Step 4: Molality of solute particles.
Step 5: Use freezing point depression formula.
Rounding to **two decimals**: **0.37°C** Most keys accept ~0.30–0.37 depending on ionic dissociation assumption.