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Standard XII

Chemistry

Depression in Freezing Point

The freezing ...

Question

The freezing point depression of $0.1$ molal solution of acetic acid in benzene is $0.256$ K, $K_{f}$ for benzene is $5.12 K K g m o l^{- 1}$ . What condition can you draw about the molecular state of acetic acid in benzene?

Acetic acid is doubly associated

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Benzene is doubly associated

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Both are equally associated

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None of the above.

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Solution

The correct option is C Acetic acid is doubly associated
We have,
$Δ T_{f} = i K_{f} m$

$0.256 = i * 5.12 * 0.1$

$i = 0.5$

since, the value of $i$ is less than 1, and acetic acid is solute,

Hence, we can say that acetic acid is doubly associated.

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The freezing point depression of 0.1 molal solution of acetic acid in benzene is 0.256K, Kf for benzene is 5.12KKgmol−1. What condition can you draw about the molecular state of acetic acid in benzene?

The correct option is C Acetic acid is doubly associatedWe have,ΔTf=iKfm0.256=i∗5.12∗0.1i=0.5since, the value of i is less than 1, and acetic acid is solute,Hence, we can say that acetic acid is doubly associated.

The freezing point depression of $0.1$ molal solution of acetic acid in benzene is $0.256$ K, $K_{f}$ for benzene is $5.12 K K g m o l^{- 1}$ . What condition can you draw about the molecular state of acetic acid in benzene?

The correct option is C Acetic acid is doubly associated
We have,
$Δ T_{f} = i K_{f} m$

$0.256 = i * 5.12 * 0.1$

$i = 0.5$

since, the value of $i$ is less than 1, and acetic acid is solute,

Hence, we can say that acetic acid is doubly associated.