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A 1.00 molal aqueous solution of trichlo...

A `1.00` molal aqueous solution of trichloroacetic acid `(CCl_(3)COOH)` is heated to its boiling point. The solution has the boiling point of `100.18^(@)C`. Determine the van't Hoff factor for trichloroacetic acid.
(`K_(b)` for water `=0.512K kg "mol"^(-1)`)

Text Solution

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`M = 1, Tb = 100. 18^(@)C`
`T^(@)b = 100 .^(@)C i = ? , Deltatb = 0.18.^(@)C`
`Kb = 0.512 kg 1` mol.
`Delta Tb (th_(10)) = Kb xx M`
`Delta Tb(thco) = 0.512 xx 1 = 0.512`
`L = (DeltaT_(b) ("obs"))/(DeltaT_(b)("theo")) = (0.18)/(0.512) = 0.35156`.
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