How is the potential of the reference electrode changing in a combination Ag/AgC

Question

How is the potential of the reference electrode changing in a combination Ag/AgCI reference electrode and ion-selective electrode bromine electrode? combination Ag/AgCl reference 1. Chlorine concentration is changing as a result of reaction with H+ forming HC) and reference electrode potential changes according to Nernst equation O 2. Reference electrode potential is not changing O3. Reference electrode potential increases because of the heat produced in the reaction (exothermic reaction) 4. Silver ions get reduced, which reduces the standard half-cell voltage 5. None of these

Explanation / Answer

Answer is A

as the rate of change in potential at the Ag/AgCl electrode, due to chloride ion depletion, reaches an inflection point once the chloride ions deplete completely near the electrode surface.

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