Question

`Ag_((s))|AgBr_((s))|Br^(-)(0.011M)||Cl^(-)(0.2M)|AgCl_((s))|Ag_((s))` if `K_(sp)` of `AgBr` & `AgCl` at `25^(@)C` are `10^(-12)` & `10^(10)` respectively find which is/are true for above cell at `25^(@)C(log2=0.3)`
A. As `E_(Ag^(+)//Ag)^(@)` is not given so `E_("cell")` cannot be determined
B. `E_("cell")` is `0.0413` volt
C. `/_Glt0`
D. `E^(@)=0`

Answer 1

Correct Answer - B::C
`E_(cl^(-)//AgCl//Ag)^(@)=E_(Ag^(+)//Ag)^(@)+(RT)/F IN K_(sp)`………..(i)
`E_(Br^(-))^(@)//AgBr//Ag=E_(Ag^(+)//Ag)^(@)+(RT)/F In K_(sp)`…..(ii)
as `E_(Ag^(+)//Ag)^(@)` will be cancelled onn subtractions (i) & (ii)
So `E_("cell")` can be determined