Presence of Other Substances

Definition

This refers to the effect that other substances in a reaction mixture can have on the rate of a chemical reaction. These substances may act as catalysts or inhibitors, speeding up or slowing down the reaction.

Related terms

Catalyst:

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

Inhibitor: A substance that slows down or prevents a particular chemical reaction.

Reaction Rate:

The speed at which reactants are converted into products in a chemical reaction.