Redox reaction: Reduction and Oxidation reactions
Redox reaction is the type of chemical reaction between two substances in which one substance gains oxygen atoms and another substance loses oxygen atoms. In the redox reaction the substance that gains oxygen atoms is oxidized and another substance that losses oxygen atoms is reduced. The reaction in which there is the involvement of oxidation and reduction reaction is known as the redox reaction.
Table of content:
- Oxidation reaction
- Reduction reaction
- Redox reaction
- Examples of redox reaction
- Oxidizing and Reducing agent
- Application of oxidation reaction in real life
Oxidation reaction:
The type of chemical reaction in which one substance of participating reactant gains oxygen atoms, electronically oxidation reaction is the chemical reaction in which one substance of participating reactant losses electrons.
C + O2 → CO2
Here carbon gains oxygen atom and forms carbon dioxide. Electronically carbon losses(or shares) its 4 electrons, therefore carbon is oxidized to carbon dioxide.
Oxidation of copper to copper oxide
When we heat copper powder on a china dish, copper powder turns to black colour,the surface of copper powder becomes coated with black copper oxide(II),it is because oxygen is added to copper and copper oxide is formed.
In this reaction oxygen is added to copper, therefore copper is oxidized
Reduction reaction:
The type of reaction in which one substance of participating reactants losses oxygen atoms, electronically reduction reaction is the chemical reaction in which one element of participating reactant gains electrons.
The reaction of copper oxide and hydrogen gas
In this reaction Copper oxide losses oxygen, therefore copper oxide is reduced, electronically copper oxide gains an electron and forms copper.
Redox reaction:
We observe in all the above reaction of oxidation and reduction that if one substance is oxidized then another substance is reduced in short both reaction oxidation and reduction always occurs simultaneously if one substance losses electrons then another substance gains those electrons. The type of reaction in which there is the involvement of oxidation as well as reduction reaction is known as the redox reaction.
In this chemical reaction, copper oxide is reduced to copper, and hydrogen is oxidized to water.
Some other examples of redox reactions are
ZnO + C → Zn + CO
In this redox reaction, zinc oxide is reduced to zink, and carbon is oxidized to carbon mono oxide.
MnO2 + 4HCl → MnCl2 +2H2O+Cl2
In this redox reaction, Magnesium oxide is reduced to Magnesium chloride and hydrochloride is oxidized to chlorine.
Oxidizing and Reducing Agent:
The oxidation and reduction reactions are always paired together since both of the reactions always occur together so in a single word they are known as redox reactions.
The substance which is reduced in the redox reaction is known as an oxidizing agent and the substance which is oxidized is known as the reducing agent.
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Application of Oxidation reaction in real life:
Corrosion: Corrosion means spoilage of the surface of metals when it comes in contact with water, acid, or base, its surface spoils . An example of corrosion is rusting of iron. In presence of oxygen and water, the iron becomes coated with a brown powder substance known as ferric oxide(iron oxide).
Rancidity: Have you observed the unpleasant smell of stale food, it happens because food contains fat and oil that oxidized to new chemicals which are responsible for the bad smell, it is known as rancidity. For avoiding rancidity the antioxidizing agents are used in food.
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