Question

How much electric charge is required to oxidise 1 mole of h2o to o2?

Answer 1

Consider the equation

2H2O ---> O2 + 4H+ + 4e-

During the liberation of 1 mole of oxygen 4 electrons are involved.

1 faraday = 6.023x10^23 electrons

No.of Faraday = No. of electrons passed through/ 6.023x10^23

  = 4/6.023x10^23

  = 0.664x10^-23 F