Topic Content:
- Types of Chemical Reactions II
- Catalytic Reaction
- Characteristics of a Catalyst
- Types of Catalyst
- Natural Catalyst
- Artificial Catalyst
- Positive and Negative Catalyst
6. Catalytic Reaction:
A catalyst is a substance which alters the rate of a chemical reaction but remains chemically and quantitatively unchanged at the end of the reaction.
Characteristics of a Catalyst:
i. A Catalyst alters the rate of a chemical reaction.
ii. A Catalyst remains unchanged at the end of a reaction.
iii. A Catalyst is specific in action i.e. a substance that catalyses one reaction may not catalyse another.
iv. A Catalyst cannot start a reaction.
v. A Catalyst has no effect on the equilibrium of a reversible reaction.
vi. A catalyst does not affect the type of products formed in a reaction.
vii. The effect of a solid Catalyst is increased by increasing its surface area. Increasing surface area leads to an increased number of catalytic sites available for reaction, thereby increasing catalyst productivity.
viii. A catalyst will affect the rate of reaction even though it is present in every small quantity.
Types of Catalyst:
There are two types: Natural and Artificial Catalyst.
I. Natural Catalyst:
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