NEETChemistryElectrochemistry
Value of standard electrode potential for the oxidation of Cl – ions is more positive than that of water, even then in the electrolysis of aqueous sodium chloride, why is Cl – oxidized at anode instead of water?
Options
- AThe concentration of Cl – ions in the solution is higher than that of water molecules.
- BUnder the conditions of electrolysis of aqueous sodium chloride, oxidation of water at anode requires overpote
- CThe standard electrode potential alone determines the species oxidized at the anode.
- DThe concentration of Na⁺ ions in the solution promotes the oxidation of Cl – ions.
Correct answer
B. Under the conditions of electrolysis of aqueous sodium chloride, oxidation of water at anode requires overpote
Step-by-step solution
Correct Option is : (B) Under the conditions of electrolysis of aqueous sodium chloride, oxidation of water at anode requires overpotential hence Cl – is oxidized instead of water