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The standard electrode potential Eo at a fixed temperature and in a given medium is dependent on
- a)only the extent of the reaction
- b)only the extent of electrode reaction
- c)electrode reaction and electrode composition
- d)only electrode composition
Correct answer is option 'C'. Can you explain this answer?
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The standard electrode potential Eoat a fixed temperature and in a giv...
Depend only electrode reaction and electrode composition
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The standard electrode potential Eoat a fixed temperature and in a giv...
The standard electrode potential (Eo) is a measure of the tendency of an electrode to gain or lose electrons during a redox reaction. It is defined as the potential difference between the electrode and the electrolyte solution when all species are at their standard states (1 M concentration and 1 atm pressure) at a fixed temperature.
The standard electrode potential is influenced by two main factors: the extent of the electrode reaction and the electrode composition. Let's discuss each factor in detail:
1. Extent of the electrode reaction:
- The standard electrode potential is a measure of the thermodynamic tendency of the electrode to undergo a redox reaction. It depends on the difference in the standard chemical potentials of the species involved in the reaction.
- The extent of the electrode reaction is determined by the concentration of the reactants and products at the electrode surface. The more reactants are present, the greater the tendency for the electrode to gain or lose electrons.
- Therefore, the standard electrode potential is influenced by the extent of the electrode reaction. If the reaction is more favorable, the standard electrode potential will be higher.
2. Electrode composition:
- The standard electrode potential also depends on the nature and composition of the electrode material. Different materials have different electron affinities and tendencies to gain or lose electrons.
- The chemical composition of the electrode can affect the electron transfer process and the redox reaction. This, in turn, affects the standard electrode potential.
- For example, in the case of a hydrogen electrode, the standard electrode potential is determined by the presence of hydrogen ions and the reaction of hydrogen gas with these ions. The electrode potential can change if the composition of the electrode material is altered.
In conclusion, the standard electrode potential (Eo) is dependent on both the extent of the electrode reaction and the electrode composition. Both factors contribute to the overall tendency of the electrode to gain or lose electrons and determine the potential difference between the electrode and the electrolyte solution.
The standard electrode potential is influenced by two main factors: the extent of the electrode reaction and the electrode composition. Let's discuss each factor in detail:
1. Extent of the electrode reaction:
- The standard electrode potential is a measure of the thermodynamic tendency of the electrode to undergo a redox reaction. It depends on the difference in the standard chemical potentials of the species involved in the reaction.
- The extent of the electrode reaction is determined by the concentration of the reactants and products at the electrode surface. The more reactants are present, the greater the tendency for the electrode to gain or lose electrons.
- Therefore, the standard electrode potential is influenced by the extent of the electrode reaction. If the reaction is more favorable, the standard electrode potential will be higher.
2. Electrode composition:
- The standard electrode potential also depends on the nature and composition of the electrode material. Different materials have different electron affinities and tendencies to gain or lose electrons.
- The chemical composition of the electrode can affect the electron transfer process and the redox reaction. This, in turn, affects the standard electrode potential.
- For example, in the case of a hydrogen electrode, the standard electrode potential is determined by the presence of hydrogen ions and the reaction of hydrogen gas with these ions. The electrode potential can change if the composition of the electrode material is altered.
In conclusion, the standard electrode potential (Eo) is dependent on both the extent of the electrode reaction and the electrode composition. Both factors contribute to the overall tendency of the electrode to gain or lose electrons and determine the potential difference between the electrode and the electrolyte solution.
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The standard electrode potential Eoat a fixed temperature and in a given medium is dependent ona)only the extent of the reactionb)only the extent of electrode reactionc)electrode reaction and electrode compositiond)only electrode compositionCorrect answer is option 'C'. Can you explain this answer?
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