Redox Reactions

  • The reaction in which oxidation and reduction take place simultaneously are called redox reaction.
  • In a redox reaction, one substance is oxidized while another is reduced.

Oxidation

Oxidation is a reaction which involves the addition of oxygen or the removal of hydrogen from a substance or the loss of electron of a substance.

C + O2 → CO2 

H2S + Br2 → 2 HBr + S  


Reduction

Reduction is a reaction which involves the addition of hydrogen or removal of oxygen from a substance or the gain  of electron to a substance.

 N2 + 3 H2 → 2NH3

 ZnO  + C  → Zn  + CO  


Oxidizing Agent

Oxidizing agent is a substance which gives oxygen or removes hydrogen and cause oxidation of other substances.

The substance which help in the reduction of the other substance is called oxidizing agent.


Reducing Agent

Reducing agent is a substance which gives hydrogen or removes oxygen and causes reduction of the other substances.

The substance which help in the oxidation of other substances is called reducing agent.


Applications of Redox Reactions

Redox reactions are not just an intricate chemical dance; they play crucial roles in various aspects of our lives. Here are a few examples:


Rusting of Iron: The process of iron rusting is a redox reaction. Iron oxidizes in the presence of oxygen and water, forming rust.


Cellular Respiration: Redox reactions are vital for energy production in cells during processes like cellular respiration. They help in the breakdown of glucose, releasing energy for the cell to use.


Batteries: Redox reactions are at the heart of battery technology. They allow for the storage and release of electrical energy by the movement of electrons between electrodes.