The Vapour pressure of solution containing `2g` of `NaCl` in `100g` of water at `100^(@)C` is `753.2mm` of `Hg`, then degree of dissociation of `NaCl`.

Options

A. `0.6`
B. `0.7`
C. `0.8`
D. `0.9`

Answer

1

Explanation

`(P^(@)-P_(S))/(P_(S))=(wxxM)/(mxxW)`
`(760-753.2)/(760)=(2xx18)/(mxx100)`
`m_(exp)=36.56`
`{:(NaCl,rarr,Na^(+),+,Cl^(-)),(1-alpha,,alpha,,alpha):}`
`M_(the)/M_(exp)=1+alpha" "rArr" "58.5/36.56=1+alpha`