Question Bank [2022] — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryQuestion Bank [2022]3 Marks
Question
Write two applications of electrochemical series.
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Answer
Applications of electrochemical series:
The relative strength of reducing agents:
The species on the right side of half-reactions are reducing agents.
The species appearing at the bottom right side of half-reactions associated with large negative E° values are the effective electron donors. They serve as strong reducing agents.
The strength of reducing agents increases from top to bottom as E° values decrease.
Spontaneity of redox reactions:
Spontaneity of redox reactions can be predicted from values of electrode potential in electrochemical series.
If the species with a higher E° value is reduced (accepts electrons) and that with a lower E° value is oxidized (donates electrons), then the redox reaction in a galvanic cells is spontaneous.
The standard cell potential must be positive for a cell reaction to be spontaneous under the standard conditions.
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