Redox and Disproportionation Reactions
Redox and Disproportionation Reactions
- Redox reactions involve the shifting of electrons between reacting particles.
- In redox reactions, “Reduction” refers to the gaining of electrons, while “Oxidation” denotes the loss of electrons.
- Oxidation states, indicated by a number, indicate the total number of electrons that an atom either loses or gains in order to form a chemical bond with another atom.
- An increasing oxidation number signifies oxidation, while a reducing oxidation number signifies reduction.
- The term “Redox” is derived from two words: reduction and oxidation. In every redox reaction, both reduction and oxidation occur simultaneously.
- A substance which causes another substance to be oxidised is termed as an oxidising agent. It gains electrons and is therefore reduced.
- Conversely, a substance causing another substance to be reduced is known as a reducing agent. It loses electrons and is thus oxidised.
- Redox reactions are of several types: Combination, Decomposition, Displacement, and Disproportionation.
- In Disproportionation reactions, the same element is both oxidised and reduced.
- For a redox reaction to occur, the reactants must contain elements that have different electronegativities. The greater the difference in electronegativity, the greater the propensity for a redox reaction to occur.
- In terms of half-reactions, a redox process can be broken down into two parts: an oxidation half-reaction (which shows the electrons lost by the reductant) and a reduction half-reaction (which shows the electrons gained by the oxidant).
- Redox reactions play a crucial part in numerous chemical reactions in everyday life, including combustion, respiration, photosynthesis, and the function of batteries.