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    Standard Hydrogen Electrode MCQ - Practice Questions with Answers

    Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

    Quick Facts

    • 5 Questions around this concept.

    Concepts Covered - 1

    Standard Hydrogen Electrode

    A hydrogen electrode in which pressure of hydrogen gas is maintained at 1 atm and the concentration of H+ ions in the solution is 1M, is called a standard hydrogen electrode (SHE).

    \begin{array}{ll}{\text {SHE half reaction }} & {\text {Electrode potential }} \\ {\mathrm{H}_{2} \rightarrow 2 \mathrm{H}^{+}+2 \mathrm{e}^{-}} & {0.0 \mathrm{V}(\text {Anode})} \\ {2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_{2}} & {0.0 \mathrm{V}(\text {Cathode})}\end{array}

    • The emf of a standard hydrogen electrode is taken as 0.00 V at all temperature.
    • It is a reversible electrode.
    • It is used as a reference electrode.
    • A saturated calomel electrode is also used as a secondary reference electrode. It has a potential of -0.24 volt.

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    Standard Hydrogen Electrode

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