How standard hydrogen electrode works
Answers
Answer:
In standard hydrogen electrode 1M HCl is taken and hydrogen gas is taken at 1atm pressure and temperature is maintained at 25℃. In these conditions its standard reduction potential and standard oxidation potential is always zero. This is the reason it can be used as a reference electrode.
the redox half cell: 2 H+(aq) + 2 e− → H2(g)
Answer:
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Explanation:
The standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electroreactions, hydrogen's standard electrode potential (E°) is declared to be zero volts at any temperature.[1] Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature.
Hydrogen electrode is based on the redox half cell:
2 H+(aq) + 2 e− → H2(g)
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