| Catalyst | a substance that increases the rate of reaction without being consumed in the overall reaction. |
| Combination reaction | a reaction in which two substances combine to form a third substance |
| Combustion reaction | a reaction of a substance with oxygen, usually with the rapid release of heat to produce a flame. |
| Chemical equation | the symbolic representation of a chemical reaction in terms of the chemical formulas. |
| Decomposition reaction | a reaction in which a single compound reacts to give two or more substances. |
| Displacement reaction (single-replacement reaction) | a reaction in which an element reacts with a compound displacing an element from it |
| Metathesis reaction (double-replacement reaction) | a reaction that appears to involve the exchange of parts of the reactants (when written as a molecular equation). |
| Precipitate | a solid formed by a reaction in solution |
| Product | a substance that results from a chemical reaction |
| Reactant | a starting substance in a chemical reaction |