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Standard Hydrogen Electrode - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main
Quick Facts
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8 Questions around this concept.
Solve by difficulty
If an aqueous solution of NaF is electrolyzed between inert electrodes, the product obtained at anode is
Electrolysis of a concentrated aqueous solution of NaCl results in
(a) Increase in pH of the solution
(b) Decrease in pH of the solution
(c) O2 liberation at the cathode
(d) H2 liberation at the anode
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).
SHE half reaction Electrode potential
$\mathrm{H}_2 \rightarrow 2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \quad 0.0 \mathrm{~V}$ (Anode)
$2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_2 \quad 0.0 \mathrm{~V}$ (Cathode)
- The emf of a standard hydrogen electrode is taken as 0.00 V at all temperatures.
- It is a reversible electrode.
- It is used as a primary reference electrode.
- Potentials of other species can be calculated by conducting a cell with SHE as one of the electrodes and then calculating the potential difference by various methods.
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