220. A solution containing 1.632 g of trichloroacetic acid and 100 g of benzene solidifies at a temperature that is 0.350 K below the freezing point of pure benzene. Determine the molar mass of the solute and compare it with the molar mass of trichloroacetic acid. Conclude whether there is a dissociation or association of trichloroacetic acid in benzene? The cryoscopic constant of benzene is 5.12 K kg mol-1
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