1.

If alpha is the degree of dissociation of Na_(2)SO_(4), the Vant Hoff's factor (i) used for calculating the molecular mass is

Answer»

`1+alpha`
`1-alpha`
`1+2ALPHA`
`1-2alpha`

SOLUTION :`{:(Na_(2)SO_(4),hArr,2Na^(+),+,SO_(4)^(2-)),("Mol. before diss. 1",,0,,0),("Mol. after diss " 1-alpha,,2alpha,,1alpha):}`
`i=(Exp. C.P.)/("Normal C.P.")=1-alpha+2alpha+alpha=1+2alpha`


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