1.

A 0.561 m solution of anunknown elecrolyte depresses the freezing point of water by 2.93^(@)C. What is van't Hoff factor for the electrooyte ? The freezing point depression constant (K_(f)) for water is 1.86 kg mol^(-1).

Answer»


Solution :`i=(DeltaT_(f))/(K_(f)xxm)`
`DeltaT_(f)=2.93^(@)C, 2.93 K, m = 0.561 " mol KG"^(-1)`
`K_(f)=1.86^(@)C" kg mol"^(-1)=1.86" K kg mol"^(-1)`
`i=((2.93K))/((1.86" K kg mol"^(-1))XX(0.561" mol kg"^(-1)))=2.81`


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