what is SHE or standard hydrogen electrode
Answers
Answer:
it is an refferece electrode whose own electrode potential is take 0 .
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Answer:
Explanation:
The potential of individual half cell cannot be measured
We can measure only the difference between two half cell potentials that gives the emf of the cell .
If we choose the potential of one electrode ( half - cell ) then that of the other can be determined wrt this .
According to convention , a half cell called Standard Hydrogen Electrode represented by Pt ( s ) | H₂ ( g ) | H⁺ ( aq ) is assigned a zero potential at all temperatures .
H⁺( aq ) + e⁻ ⇒ 1/2 H₂ ( g )
The SHE consists of a platinum electrode coated with platinum black .
The electrode is dipped in an acidic solution and pure hydrogen gas is bubbled through it .
Pressure of Hydrogen gas is 1 bar and the concentration of hydrogen ion in the solution is one molar .
