The freezing point of a solution containing 0.2g of acetic acid in 20.0 g benzene is lowered by 0.45°C. The degree of association of acetic acid in benzene is (Assume acetic acid dimerises in benzene and Kf for benzene = 5.12 K kg mol–1) M observed of acetic acid = 113.78

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Detailed Solution

observed mol.wt. of CH3COOH = 113.78gi<1 ; CH3COOH associates(dimerizes)in Benzenei=1-+/20.53 = 1-/2/2 =0.47 = 0.94% of association = 94%

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