Reference Electrode
Reference electrode
is an
electrode
which has stable and well-known
electrode potential
. High stability of electrode potential usually reached by emplying of a
redox
system with constant (buffered or saturated) concentrations of each participants of the redox reaction. Reference electrodes are used to measure
electrochemical potential
. Common reference electrodes and potential with respect to the standard hydrogen electrode:
Standard hydrogen electrode
(E=0.000V)
Calomel Electrode
(E=-0.247V saturated)
Copper Copper Sulphate Electrode
(E=-0.318V)
Silver Chloride Electrode
(E=-0.225V saturated)
pH-electrode
(in case of
pH
buffed solutions, see
buffer solution
)
Palladium-Hydrogen electrode
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