First slide

Theory of dilute solutions

Question

The freezing point of a 0.05 molal solution of non-electrolyte in water is
(K_f=1.86 K m^-1)

Moderate

A

-1.86 $°$ C
B

-0.93 $°$ C
C

-0.093 $°$ C
D

0.093 $°$ C

Solution

$∆ T_{f} = 1.86 \times 0.05 = 0.093; ∴ T_{f} = 0 - 0.093 = - 0.093 ° C$

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