| http://www.w3.org/ns/prov#value | - FIG. 2 is a graph of the charging and discharging potential of a PbO2 cathode, as measured against Hg/Hg2 SO4 /1 M H2 SO4 as reference electrode, the electrolyte consisting of 2 M Pb (BF4)2 solution (pH = 0 in completely discharged state, T = 25??? C).
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