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A 1.0 molal aqueous solution of tricloro...

A 1.0 molal aqueous solution of tricloroacetic acid `(C C_(3)COOH)` is heated to its boiling point. The solution has the boiling point 0f `100^(@)C`. Detrmine van't Goff factor for trichoroaccetic acid `(K_(b) "for water "= 0.512 "KKg mol"^(-1))`.

Text Solution

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The correct Answer is:
0.351
`DeltaT_("observed")=(100.18-100.0)=09.18^(@)C=0.18 K`
`DeltaT_("calculated")=K_(b)xxm=(0.512" K kg mol"^(-1))xx(0.1" mol kg"^(-1))=0.512 K`
`(DeltaT_("observed"))/(DeltaT_("calculated"))=((0.18K))/((0.512 K))=0.351.`
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