5. Half wave potential is a tool for
(a) identification of electroactive species
(b) determination of concentration of electroactive species
(c) quantitative analysis
(d) study of half life of
electroactive species.
nhin measurements due to
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Answer:
In a given supporting electrolyte, the half-wave potential is unique for each element and its different valence states and chemical forms. Observation of a current peak at a specific half-wave potential therefore identifies the chemical species producing the current.
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A half-wave potential is a tool for the determination of the concentration of electroactive species. (option b)
- The wave current of polarography is equal to one-half of the diffusion current in the case of half-wave potential.
- Each and every element has unique half-wave potential.
- Their valance states and chemical forms also determine their half-wave potential.
- It basically determines how much an electroactive species is present in an electrolyte.
- In short, the determination of concentration is the main motive of half-wave potential.
- Thus option b is correct and appropriate.
More details about polarography:
The curve which is obtained from polarography is known as
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In polarography, KCl is used to ------ migration current. a)Eliminate b)Increase c)maintain d)decrease
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