10 V
Sometimes metals like platinum or gold are used as inert electrodes They do not participate in the reaction but provide their surface for
oxidation or reduction reactions and for the conduction of electrons For example, Pt is used in the following half-cells:
Hydrogen electrode:  Pt(s)|H2(g)| H+(aq)
With half-cell reaction:  H+ (aq)+ e– ® ½ H2(g)
Bromine electrode: Pt(s)|Br2(aq)| Br–(aq)
Rationalised 2023-24
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Chemistry
With half-cell reaction: ½ Br2(aq) + e– ® Br–(aq)
The standard electrode potentials are very important and we can
extract a lot of useful information from them The values of standard
electrode potentials for some selected half-cell reduction reactions are
given in Table 2