4Co3++2H2O=4Co2+O2↑+4H+
E[Co(NH3)6/Co(NH3)6??3?2?[Co3?]]?E(Co/Co)?0.059lg[Co2?]?3?2??E(Co3?/Co2?)?0.059lgK稳[Co(NH3)6]K稳[Co(NH3)6]?2??2?1.38?105?1.81?0.059lg?0.04V351.58?10设[NH3]?1.0mol?dm?3则：[OH?]?1.0?1.8?10?5?4.24?10?3mol?dm?3O2?4H2O?4e??4OH?0.059p(O2)/p?0.0591E(O2/OH)?E(O2/OH)?lg?0.401?lg?0.45V?4?3444[OH](4.24?10)???
E?[Co(NH3)6/Co(NH3)6] 故 Co（NH3）63+不能氧化水 3?2?
