Consider the following oxidation reactions:
Cu → Cu2+ + 2e- ; Eo = -0.34 volt
Cu → Cu+ + e- ; Eo = -0.52 volt
Which of the oxidation state has more stability?
Answer & explanation
Correct answer: option 2
Stability of an oxidation state depends on its electrode potential that further depends on ionisation energy, enthalpy of sublimation and hydration energy.