Question

Represent the cell in which following reaction takes place `:`
`Mg(s)+2Ag^(o+)(0.0001M)rarr Mg^(2+)(0.130M)+2Ag(s)` calculate its `E_(cell)` if `E^(c-)._(cell)=3.17V. `

Answer 1

The cell can be written as `Mg|Mg^(2+)(0.130M)||Ag^(+)(0.0001M)|Ag`
`E_((cell))=E_((cell))^(Ө)-(RT)/(2F)ln([Mg^(2+)])/([Ag^(+)]^(2))`
`=3.17V-(0.059)/(2)log((0.130)/((0.0001)^(2)))=3.17V-0.21V=2.96V`.