Concentration Cell
A concentration cell is formed when:
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About This Question
- Subject
- chemistry
- Chapter
- redox reactions and electrochemistry
- Topic
- concentration cell
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Both electrodes are of same material but different concentrations
A Concentration Cell is a unique electrochemical cell where the two half-cells are chemically identical but have different concentrations of the electrolyte.
- Structure: Both the anode and cathode are made of the same metal immersed in solutions of the same salt but at different concentrations (C1 and C2).
- EMF (Ecell): Driven purely by the entropy of dilution. The standard cell potential (E∘) is zero because the electrodes are identical.
- Reaction occurs as ions move from higher concentration to lower concentration symbolically through electron flow.
This easy difficulty chemistry question is from the chapter redox reactions and electrochemistry, covering the topic of concentration cell. It appeared in the 2025 exam.
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