Question

How do catalysts affect rates of reaction?

Answer 1

A catalyst increases the reaction without chemically changing the substances involved.

When you make Kool-aid, you could pour the powder into the water and then walk away and wait 20 or thirty minutes for the Kool-aid to diffuse evenly throughout the water. However, most of us are impatient and we like to stir things up. By string with a spoon, the spoon acts as catalyst and increases the rate at which the Kool-Aid diffuses. But the spoon does not change the characteristics of the Kool-Aid

I hope this was helpful.
SMARTERTEACHER