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The molal depression constant for water ...

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

A

`-1.86^(@)C`

B

`-0.93^(@)C`

C

`0.093^(@)C`

D

`0.93^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaT_(f)=K_(f) xx "Molality" =1.86 xx 0.05 =0.093`
Thus, freezing point =`1-0.093 = -0.093`
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The freezing point of a 0.05 molal solution of a non-electrolyte in water is [K_(f)=1.86K//m]

The freezing point of a 0.05 molal solution of a non-electrolyte in water is: ( K_(f) = 1.86 "molality"^(-1) )

The molal freezing point constant for water is 1.86^(@)C//m . Therefore, the freezing point of 0.1 M NaCl solution in water is expected to be:

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