Measurement of the Capacity of Eectrical Double Layer at a Mercury Electrode

The capacity of the electrical double layer at the surface of mercury electrode ismeasured in an aqueous solution of 0.5M H2SO4. . The mercury/electrolyte/platinumsystem in a conductive cell with especial conductivity and suitable resistance. suchaway. that strong capacitance can be limited separately. For reducing thy effect weshould use a suitable Technique at low frequency(about 1000 Hz) and 25 0C for 0.05,and 0.005 M of electrolytes.The obtained values with respect to the potential of Calomel electrode showed that thejunction potentials corresponding to 0.05 and 0.005 M of Kcl couldnot introduce largeerrors.