Determination of the molar mass of acetic acid in benzene using freezing point depression is affected by:

complex formation

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association

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partial ionization

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dissociation

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Solution

The correct option is B association
Determination of the molar mass of acetic acid in benzene using freezing point depression is affected by association.
In benzene solution, two molecules of acetic acid associate to form one molecule.
Hence, the observed molar mass will be twice the actual molar mass.

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Similar questions

The molecular mass of benzoic acid in benzene, as determined by depression in freezing point method, corresponds to:

0.1

0.256

K_{f}

5.12 K K g m o l^{- 1}

{0.2}^{\circ} C .

K_{f}

{4.0}^{\circ} C m^{- 1}

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