अर्ध-अभिक्रिया
विकिपीडिया से, मुक्त विश्वकोश
किसी रेडॉक्स अभिक्रिया के केवल आक्सीकरण या केवल अपचयन वाली अभिक्रिया को अर्ध-अभिक्रिया (half reaction) कहते हैं। यह ध्यान रखने योग्य है कि आक्सीकरण या अपचयन अकेले नहीं होते बल्कि साथ-साथ होते हैं, और इसीलिये इसे 'रेडॉक्स अभिक्रिया' कहते हैं।
Consider the Galvanic cell shown in the image to the right: it is constructed with a piece of zinc (Zn) submerged in a solution of zinc sulfate (ZnSO4) and a piece of copper (Cu) submerged in a solution of copper(II) sulfate (CuSO4). The overall reaction is:
- Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
At the Zn anode, oxidation takes place (the metal loses electrons). This is represented in the following oxidation half-reaction (note that the electrons are on the products side):
- Zn(s) → Zn2+ + 2e−
At the Cu cathode, reduction takes place (electrons are accepted). This is represented in the following reduction half-reaction (note that the electrons are on the reactants side):
- Cu2+ + 2e− → Cu(s)
 | यह लेख एक आधार है। जानकारी जोड़कर इसे बढ़ाने में विकिपीडिया की मदद करें। |
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