What is the formula for the depression in freezing point Delta T_f of a dilute solution containing non-volatile solute?
Answer and explanation
Correct answer: C. Delta T_f = i K_f m
- Step 1: Solute particles disrupt crystal lattice formation of the freezing solvent, lowering freezing temperature. Step 2. The freezing point depression is Delta T_f = i K_f m, where K_f is the cryoscopic constant and m is molality. Answer: Delta T_f = i K_f m. Why not the others: Division by m inverts dependence; i K_f / m is inverse; m^2 is non-linear.
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