1.

If alpha is the degree of dissociation of Na_(2)SO_(4) , the Van't Hoff factor (i) used for calculating molecular mass is :

Answer»

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

SOLUTION :`Na_(2)SO_(4)hArr2Na^(+)+SO_(4)^(2-)`
`alpha=(i-1)/(n-1)=(i-1)/2`
`i=1+2alpha`


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