In the presence of excess of anhydrous ( in torr) of water taken up is governed by `K_(p)=10^(12)atm^(-4)` for the following reaction at `273K`
`SrCl_(2).2H_(2)O(s)+4H_(2)O(g)hArrSrCl_(2).6H_(2)O(s)`
What is equilibrium vapour pressure ( in torr) of water in a closedvessel that contains `SiCl_(2).2H_(2)O(s)` ?

Options

A. `0.001 ` torr
B. `10^(3)` torr
C. `0.76` torr
D. `1.31 ` torr

Answer

3

Explanation

`K_(p)=(1)/(P_(H_(2)O(g))^(2))" "rArr" "P_(H_(2)O(g))=((1)/(K_(p)))^(1//4)`
`rArr(10^(-17))^(1//4)=10^(-3)atm.`
`:. K_(p)=10^(-3)xx760=0.76` torr