Saved Bookmarks
| 1. |
E^@ (standard electrode potential) values generally become less negative as we move across a transition series. But E^@values of Ni^2//Ni and Zn^(2+)//Zn are exceptions. Justify. |
| Answer» SOLUTION :The values of`E^@` for `Ni^(2+)//Ni ` and `ZN^(2+)//Zn`are more NEGATIVE than expected. The high negative value `E^@Ni^(2+)//Ni ` is due to the high enthalpy of hydration of `Ni^(2+)` + ions. This stabilises `Ni^(2+)`ions. The high negative value of `E^@Zn^(2+)//Zn`is due to the STABLE completely filled `3d^10` electronic configuration of `Zn^(2+)` ions. | |