At `Tl^(+) |Tl` couple was prepared by saturating 0.1 M KBr with TlBr and allowing the `Tl^(+)` from the relatively insoluble bromide to equilibrate. This couple was observed to have a potential of `-0443`V with respect to `Pb6(2+)|Pb` couple in which `Pb6(2+)` was 0.1 M. Waht is `K_(sp)` of TlBr?
(Report answer in multiplication of `10^(-8)`)
`(E_(Pb^(2+0/Pb)^(@) = `-0.126`, `E_(Tl^(+)//Tl)^(@)` = -0.336V)
(Take antilog(0.5509) = 3.55, (2.303RT)/(F) = 0.059)
[Hint: Take Pb as anode]

Answer

355