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If alpha is the degree of dissociation o...

If `alpha` is the degree of dissociation of `Na_(2)SO_(4)` the van't Hoff's factor (i) used for calculating the molecular mass is

A

`1+alpha`

B

`1-alpha`

C

`1+2alpha`

D

`1-2alpha`

Text Solution

Verified by Experts

The correct Answer is:
C
`{:(Na_2SO_4,hArr,2Na^+,+,SO_4^(2-)),(1,,0,,0),(1-alpha,,2alpha,,alpha):}`
van't Hoff factor (i)=`(1-alpha+2alpha+alpha)/1=1+2alpha`
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