Question

What are the actions of a catalyst?

Answer 1

Its speeds up a chemical reaction.

Explanation:

In simple words,
Catalysts lower down the activation energy ( the minimum energy that reactants must have to undergo a reaction ) of a chemical energy.

`color(red){"Well, how do they do this?")` Its simply because they provide an alternative route to the reaction by increasing the number of collisions between the particles.

{As all the chemical reactions take place collision between the particles of substances, the more the collision rate the faster the reaction, and this what a catalyst do.}