alleryDepression in freezing point ΔT_f for non-electrolyte solute:
AK_f × M
B-K_f
CAlways positive equal to K_b
DK_f × m (K_f = cryoscopic constant)
Answer & Solution
Correct answer: D. K_f × m (K_f = cryoscopic constant)
ΔT_f = K_f × m.
K_f for water = 1.86 K kg/mol.
Why salt is spread on icy roads (depresses freezing point of water below 0°C).
Also used to determine molar masses.
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