Definition
A state of a chemical reaction in which forward reactions and reverse reactions take place at the same rate is called chemical equilibrium
Types
There are two types of reactions
- Reversible
- Irreversible
Reversible reaction
- Those reactions in which reactant converts into product and product converts into reactant.
- These reactions are bi-directional.
- These reactions never goes to complition.
- These reactions always take place in closed container.
- These reactions represented by double head arrow.
Example
2 SIVO2-II + O20 → 2 SVIO3-II
This is an oxidation-reduction (redox) reaction:
2 SIV - 4 e- → 2 SVI
(oxidation)
2 O0 + 4 e- → 2 O-II
(reduction)
Irreversible reaction
- Those reactions in which reactant converts into product.
- These reactions are uni-directional.
- These reactions always goes to completion.
- These reactions always take place in open container.
- These reactions represented by single head arrow.
Example
2 H20 + O20 → 2 H2IO-II
This is an oxidation-reduction (redox) reaction:
4 H0 - 4 e- → 4 HI
(oxidation)
2 O0 + 4 e- → 2 O-II
(reduction)
