Explain SHE (Standard Hydrogen electrode) class 12
Answers
Answer:
A standard hydrogen electrode has five components:
1.Platinized platinum electrode
2.Acid solution that has a hydrogen ion (H +) activity of 1 mol/dm 3
3.Hydrogen gas bubbles
4.Hydroseal to prevent interference from oxygen
5.Reservoir to attach the second half-element of the galvanic cell. Either a salt bridge or a narrow tube to prevent mixing may be used.
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 electrode reactions, hydrogen's standard electrode potential (E⁰) is declared to be zero volts at any temperature. Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature.......
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Explanation:
A Standard Hydrogen Electrode (SHE) is an electrode that scientists use for reference on all half-cell potential reactions. The value of the standard electrode potential is zero, which forms the basis one needs to calculate cell potentials using different electrodes or different concentrations.