1.

The degree of ionization of HF in 1.00 m aqueous solution is (freezing = 1.86^(@)C) is :

Answer»

0.06
0.12
0.03
0.09

Solution :`DeltaT_(F)=ixxK_(f)xxm`
`i=(DeltaT_(f))/(K_(f)xxm)=(0.197)/(1.86xx0.1)=1.059`
For dissociation
`ALPHA=((i-1))/((n-1))=((1.059-1))/((2-1))-0.059`
`=5.9%~~6%`


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