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Question
The `"E"_("M"^(2+)//"M")^0` value for copper is positive. Suggest a possible reason for this.
Answer in Brief
Solution
- Copper has a positive reduction potential. Elemental copper is more stable than Cu2+.
- Copper having a positive sign for electrode potential merely means that copper can undergo reduction at a faster rate than the reduction of hydrogen.
- The electron-giving reaction (oxidation) of copper is slower than that of hydrogen. It is determined from the result of the S.H.E (Standard Hydrogen Electrode) potential value experiment.
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