Catalyst

• Is a substance that is capable of increasing the reaction rate of a specific chemical reaction
• Does not get consumed during the chemical reaction
• Is capable of regenerating after the reaction is complete and can be used in other reactions
• Can be classified as homogeneous (when it is in the same phase of matter as the reactant) or heterogeneous (when it is in a different phase of matter from that of the reactants)

Reagent

• Is a substance or mixture that is used in chemical analysis and other reactions
• May or may not be consumed during a chemical reaction
• May or may not lower the activation energy of the reaction
• May or may not regenerate after the reaction is complete