Transition and Inner Transition Elements — Chemistry STD 12 — Question
Tamilnadu BoardEnglish MediumSTD 12ChemistryTransition and Inner Transition Elements2 Marks
Question
The $E _{ M ^{2+} / M }^0$ value for copper is positive. Suggest a possible reason for this.
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Answer
1. Copper has a positive reduction potential. Elemental copper is more stable than $Cu ^{2+}$.
2. Copper having a positive sign for electrode potential merely means that copper can undergo reduction at a faster rate than the reduction of hydrogen.
3. 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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