All chemical processes in which atoms' oxidation states are altered are redox (oxidation-reduction) reactions.
Whenever we see a physical or chemical change in any object near us, we automatically conclude that some reaction has occurred. Have you ever wondered which reaction is taking place when we burn a matchstick?
In real life, combustion is a famous example of redox processes. When we think of combustion, though, we normally think of it as a physical rather than a chemical process. Another significant example of redox reactions is burning organic matter and hydrocarbons in fossil resources.
The oxygen in the atmosphere reacts with the carbon and hydrogen in the chemical being burnt, forming a bond. Oxygen in the atmosphere is reduced throughout combustion, while the chemical being burned is oxidized. Well now, we have talked a lot about redox reactions! But what exactly is a redox reaction?
All chemical processes in which atoms' oxidation states are altered are referred to as redox (oxidation-reduction) reactions. The loss of electrons—or the rise in oxidation state—by a molecule, atom, or ion is called oxidation. A molecule, atom, or ion gains electrons—or decreases its oxidation state—during reduction.
Every chemical reaction is represented in the form of equations and it is very important for both scientific and academic purposes that these equations are balanced.
To balance the overall reaction in an alkaline medium, OH ions and water are introduced to half of the reactions. Take the interaction involving potassium permanganate and sodium sulfite, for example:
MnO₄– + SO₃²⁻ + H₂O → MnO₂ + SO₄²⁻ + OH–
The imbalanced reaction may be split into two halves, each of which represents reduction or oxidation.
By following the above rules, we reach the final balanced reaction of potassium permanganate and sodium sulfite:
2 MnO₄– + 3 SO₃²⁻ + H₂O → 2 MnO₂ + 3 SO₄²⁻ + 2 OH–
1. How do you know if a redox reaction is acidic or basic?
It's an acidic medium if H is present throughout the reaction's balance, and it's a basic media if OH- is present.
2. How do you balance redox reactions in acidic and basic mediums?
3. What is a redox reaction?
Redox reactions are oxidation-reduction chemical processes in which the oxidation states of the reactants change.
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