Freezing-point depression and elevation are colligative properties: depend on:
ASolute mass only
BNumber of solute particles, not their chemical identity
CColor
DNature of solute
Answer & Solution
Correct answer: B. Number of solute particles, not their chemical identity
Colligative: ΔT_b, ΔT_f, π, ΔP all depend on the NUMBER of dissolved particles (not their type). Why we use i (van't Hoff factor) — accounts for dissociation. Particles of any kind, large or small, contribute equally per particle.
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