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A standard hydrogen electrode has zero electrode potential because
- a)hydrogen is easier to oxidise
- b)this electrode potential is assumed to be zero
- c)hydrogen atom has only one electron
- d)hydrogen is the lightest element
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A standard hydrogen electrode has zero electrode potential becausea)hy...
Explanation:
Assumption of Zero Electrode Potential:
- The standard hydrogen electrode is used as a reference electrode in electrochemical measurements.
- By convention, the electrode potential of the standard hydrogen electrode is assumed to be zero at all temperatures.
- This assumption simplifies the measurement and comparison of electrode potentials of other half-cells.
Role of Hydrogen:
- The electrode potential of the standard hydrogen electrode is not zero because hydrogen is easier to oxidize or because it is the lightest element.
- Instead, the electrode potential is assumed to be zero for convenience and standardization purposes.
- The standard hydrogen electrode consists of a platinum electrode immersed in a solution of 1 M HCl with a hydrogen gas pressure of 1 atm.
- The electrode potential is measured under standard conditions of temperature and pressure.
Significance of Zero Electrode Potential:
- The assumption of zero electrode potential for the standard hydrogen electrode allows for the determination of the electrode potential of other half-cells relative to this reference point.
- By comparing the electrode potentials of different half-cells to the standard hydrogen electrode, the reactivity and tendency of species to undergo oxidation or reduction reactions can be determined.
- This standardized reference point facilitates the calculation of cell potentials and the prediction of spontaneous redox reactions.
In conclusion, the standard hydrogen electrode has a zero electrode potential not because hydrogen is easier to oxidize, but because this assumption simplifies the measurement and comparison of electrode potentials in electrochemical studies.
Assumption of Zero Electrode Potential:
- The standard hydrogen electrode is used as a reference electrode in electrochemical measurements.
- By convention, the electrode potential of the standard hydrogen electrode is assumed to be zero at all temperatures.
- This assumption simplifies the measurement and comparison of electrode potentials of other half-cells.
Role of Hydrogen:
- The electrode potential of the standard hydrogen electrode is not zero because hydrogen is easier to oxidize or because it is the lightest element.
- Instead, the electrode potential is assumed to be zero for convenience and standardization purposes.
- The standard hydrogen electrode consists of a platinum electrode immersed in a solution of 1 M HCl with a hydrogen gas pressure of 1 atm.
- The electrode potential is measured under standard conditions of temperature and pressure.
Significance of Zero Electrode Potential:
- The assumption of zero electrode potential for the standard hydrogen electrode allows for the determination of the electrode potential of other half-cells relative to this reference point.
- By comparing the electrode potentials of different half-cells to the standard hydrogen electrode, the reactivity and tendency of species to undergo oxidation or reduction reactions can be determined.
- This standardized reference point facilitates the calculation of cell potentials and the prediction of spontaneous redox reactions.
In conclusion, the standard hydrogen electrode has a zero electrode potential not because hydrogen is easier to oxidize, but because this assumption simplifies the measurement and comparison of electrode potentials in electrochemical studies.
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A standard hydrogen electrode has zero electrode potential becausea)hydrogen is easier to oxidiseb)this electrode potential is assumed to be zeroc) hydrogen atom has only one electrond)hydrogen is the lightest elementCorrect answer is option 'B'. Can you explain this answer?
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