The gases liberated during the electrolysis of aqueous solution of hydrogen fluoride
Anode(+) F- +H2Oâ O2 +HF + e-
Cathode(-):H+ + e- â1/2 H2
HF in water week electrolyte and can not be completely ionized and moreover SRP of Fluorine is much higher than oxygen so, At anode O2 liberate can not F2