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Elevation in boiling point studies of Ca...

Elevation in boiling point studies of `Ca(NO_(3))_(2)` gives molar mass as `131.2`. The degree of dissociation of `Ca(NO_(3))_(2)` is
a.`100%` , b.`75%` , c.`50%` , d.`12.5%` ,

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`i=1+2alpha`
Calculate Mw of `Ca(NO_(3))_(2)` =`164`
Observed Mw of `Ca(NO_(3))_(2)` =`131.2`
`:.i=(164/131.2)=1+2alpha`
`:. alpha=0.125 = 12.5%`
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