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The standard potentials of the electrode "Dissolved atomic mercury/dissolved mercury ions"

The standard potentials of the redox electrodes "dissolved atomic mercury/dissolved mercury ions" are calculated to be E0(Hg0/Hg2+)= 0.661 V (vs. SHE) and E0(Hg0/Hg22+) = 0.410 V (vs. SHE). The standard potential of the electrode "metallic mercury/dissolved mercury ions" E0(Hg/Hg2+) = 0.8535 V (vs. SHE) is the formal potential of the electrode "dissolved atomic mercury/dissolved mercury ions" at saturation activity of atomic mercury. In all calculations involving dissolved atomic mercury below saturation activity, the standard potentials E0(Hg0/Hg2+) and E0(Hg0/Hg22+) have to be used or the relation between them and E0(Hg/Hg2+) and E0(Hg/Hg22+) has to be taken into account.

standard potentials ; redox electrode ; mercury

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