Question

How does a catalyst work?
by increasing the temperature of a chemical reaction
by decreasing the pressure of a chemical reaction
by increasing the concentration of reactants in a reaction
by decreasing the activation energy of a reaction

Answer 1

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions.

Answer 2

Answer:

by increasing or decreasing the.speed or temprature of a chemical reaction