1.

Calculate the boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming 84% dimerisation of the acid. The boiling point and K_(b) of CS_(2) are 46.2^(@)C and "2.3 K kg mol"^(-1) respectively.

Answer»


SOLUTION :`i=1-(alpha)/(2)=1-(0.84)/(2)=1-0.42=0.58`
`DeltaT_(b)=iK_(b)m=0.58xx2.3xx(0.61)/(122)xx(1000)/(50)=0.1334^(@)."HENCE "T_(b)=46..2+0.133=46.333^(@)C`.


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