Question

3.9 g of benzoic acid dissolved in 49 g of benzene shows a depression in freezing point
1.62K. Calculate the van't Hoff factor and predict the nature of solute (associated or dissociated
(Given molar mass of benzoic acid = 122 g mol, ko for benzene = 4.9 K kg mol?)
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Answer 1

3.9 g of benzoic acid dissolves in 49g of benzene shows a depression in freezing

point of 1.62K. calculate the van’t Hoff’s factor and predict the nature of solute

(association and dissociation). Molar mass=122, Kf=4.9 Kkg/mol.