What is meant by electrode potentials
Answers
Answer:
Electrode potential is defined as the potential of a cell consisting of the electrode in question acting as a cathode and the standard hydrogen electrode acting as an anode. Reduction always takes place at the cathode, and oxidation at the anode.
Answer:
Electrode potential, E, in chemistry or electrochemistry, according to an IUPAC definition,[1] is the electromotive force of a cell built of two electrodes:
on the left-hand side of the cell diagram is the standard hydrogen electrode (SHE), and
on the right-hand side is the electrode in question.
The SHE is defined to have a potential of 0 V, so the signed cell potential from the above setup is
Ecell = Eright − Eleft (SHE) = Eelectrode - 0 V = Eelectrode.
The SHE is the anode (left) and electrode is cathode (right)
An electrode potential is strictly the potential difference developed at the interface between the electrode and the solution. It is common, for instance, to speak of the electrode potential of the M+/M redox couple. These potential differences are measured relative to the potential difference developed at a suitable reference electrode, which is conventionally the SHE; that is to say, E(M+/M) = (VM - VM+) - (VH2 - VH+).