Q.

The molal depression constant for water is 1.86°C. The freezing point of a 0.05-molal solution of a non-electrolyte in water is

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a

-1.86°C

b

-.0.93°C

c

-0.093°C

d

0.93°C

answer is C.

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Detailed Solution

∆Tf=Kf×Molality=1.86×0.05=0.093 Thus, freezing point=0-0.093=-0.093
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The molal depression constant for water is 1.86°C. The freezing point of a 0.05-molal solution of a non-electrolyte in water is