At the cathode region of the electrochemical cell on the iron surface how the dissolved O2 is reduced?
At the cathode region of an electrochemical cell on an iron surface, dissolved O2 is reduced by accepting electrons from the cathode. The oxygen molecule receives two electrons from the cathode and combines with two protons (H+) from the acidic solution to form water (H2O). This reaction is represented as:
O2 + 2H+ + 2e– → H2O