GCSE Chemistry Revision "Catalysts"

Collision Theory and Activation Energy00:00:23

Chemical reactions occur when particles collide with sufficient energy. The rate of reaction depends on the frequency of successful collisions, and activation energy is the minimum energy required for particles to react.

What is a Catalyst?00:01:03

Catalysts increase the rate of chemical reactions without being used up. They are important because they allow reactions to happen quickly without high temperatures, saving money, and they can be reused.

How Catalysts Work00:01:28

Catalysts provide an alternative reaction pathway with a lower activation energy. This means more particles have enough energy to collide successfully, which increases the reaction rate.

Key Points about Catalysts00:02:11

Catalysts are not included in chemical equations because they aren't reactants. Different reactions require specific catalysts, and enzymes are biological catalysts found in living organisms.