In chemistry, the rate of change refers to how quickly or slowly a reaction occurs. It's the speed at which reactants are converted into products.
This is the speed at which reactants are transformed into products during a chemical reaction.
A substance that increases the rate of a chemical reaction by reducing the energy needed for the reaction to occur, but isn't consumed in the process.
An equation that relates the rate of a reaction to the concentrations of its reactants and determines how they affect the rate of the reaction.