Electrochemistry is a study of relationship between chemical change and electrical work.
OXIDATION | REDUCTION |
Loss of electron | Gain of electron |
Gain of oxygen | Loss of oxygen |
Loss of hydrogen | Gain of hydrogen |
Increase in oxidation number | Decrease in oxidation number |
Eg. : Zn(s) → Zn2+ (aq) + 2e- Oxidation no. : 0 +2 | Eg. : 2H+(aq) + 2e- → H2 (g) Oxidation no. : +1 0 |
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