Why do we use platinum electrode instead of Iron (II) if we are doing a electrochemical cell for Silver and Iron (II). I thought we need silver electrode and Iron electrode, but platinum wire connecting them.
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- 27-02-2018 19:51
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- 02-03-2018 03:16
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- 02-03-2018 14:08
If you are referring to this cell:
Ag+(aq) | Ag(s) ¦¦ Fe2+(aq), Fe3+(aq) | Pt(s)
notice that both the oxidised and reduced species in the right-hand half-cell are ions in solution. In these cases, a shiny inert platinum electrode is used to conduct electrons into the solution.