electrode potential
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Posted by Bhargab Talukdar 7 years, 2 months ago
- 2 answers
Vikrant Singh 7 years, 2 months ago
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.
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Yakshith K 7 years, 2 months ago
Electrode potential, <i>E</i>, in chemistry or <a href="https://en.wikipedia.org/wiki/Electrochemistry" title="Electrochemistry">electrochemistry</a>, according to a <a href="https://en.wikipedia.org/wiki/IUPAC" title="IUPAC">IUPAC</a> definition,<a href="https://en.wikipedia.org/wiki/Electrode_potential#cite_note-1">[1]</a> is the <a href="https://en.wikipedia.org/wiki/Electromotive_force" title="Electromotive force">electromotive force</a> of a<a href="https://en.wikipedia.org/wiki/Galvanic_cell" title="Galvanic cell">cell</a> built of two <a href="https://en.wikipedia.org/wiki/Electrode" title="Electrode">electrodes</a>:
By <a href="https://en.wikipedia.org/wiki/Convention_(norm)" title="Convention (norm)">convention</a>:
<dl> <dd><i>E</i>Cell = <i>E</i>Cathode − <i>E</i>Anode</dd> </dl>From the above, for the cell with the <a href="https://en.wikipedia.org/wiki/Standard_hydrogen_electrode" title="Standard hydrogen electrode">standard hydrogen electrode</a> (potential of 0 by convention), one obtains:
<dl> <dd><i>E</i>Cell = <i>E</i>Right − 0 = <i>E</i>Electrode</dd> </dl>The left-right convention is consistent with the international agreement that redox potentials be given for reactions written in the form of reduction half-reactions.
Electrode potential is measured in <a href="https://en.wikipedia.org/wiki/Volt" title="Volt">volts</a> (V).
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