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Questions and Answers
What is the technique concerned with the study of voltage current relationships during electrolysis in a cell?
What is the technique concerned with the study of voltage current relationships during electrolysis in a cell?
- Coulometry
- Voltammetry (correct)
- Polarography
- Electrochemical spectroscopy
What is the potential at which the substance begins to oxidize or reduce?
What is the potential at which the substance begins to oxidize or reduce?
- Decomposition potential (correct)
- Reduction potential
- Standard potential
- Oxidation potential
What is the term for the small current which exists even in the absence of the analyte?
What is the term for the small current which exists even in the absence of the analyte?
- Decomposition current
- Residual current (correct)
- Limiting current
- Charging current
What is the region in the polarogram in which the current becomes independent of the applied potential and the working electrode is completely polarized?
What is the region in the polarogram in which the current becomes independent of the applied potential and the working electrode is completely polarized?
What is the current required for charging the electrical double layer at the surface of a mercury electrode?
What is the current required for charging the electrical double layer at the surface of a mercury electrode?
Flashcards
Voltammetry
Voltammetry
A technique studying voltage and current during electrolysis.
Decomposition potential
Decomposition potential
Potential where a substance starts oxidation/reduction.
Residual current
Residual current
Small current present without analyte.
Limiting current
Limiting current
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Charging current
Charging current
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Study Notes
Electrolysis and Polarography
- The technique concerned with the study of voltage-current relationships during electrolysis in a cell is known as polarography.
- The potential at which a substance begins to oxidize or reduce is called the half-wave potential.
- The small current that exists even in the absence of the analyte is referred to as the residual current.
- The region in the polarogram where the current becomes independent of the applied potential and the working electrode is completely polarized is called the limiting current region.
- The current required for charging the electrical double layer at the surface of a mercury electrode is called the capacitive current.
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