Answer to Question #57197 in Physical Chemistry for Ahmad
Why we chose 2H2O+2e--->H2+2OH- at cathode instead we chose O2+4H+ +4e--->2H2O at cathode?
2H2O + 2e- --> H2+2OH-
In water, solution concentration of water molecules is higher then concentration of dissolwed oxygen. So, process of reduction for hydrogen in water molecule is more preferred.