click below
click below
Normal Size Small Size show me how
Chemical Reactions
| Term | Definition |
|---|---|
| Chemical reaction | A process in which one or more substances change to make one or more new substances. |
| Precipitate | A solid substance that is formed in a solution. |
| Chemical formula | A shorthand way to use chemical symbols and numbers to represent a substance. |
| Chemical equation | Uses chemical symbols and formulas as a shortcut to describe a chemical reaction. |
| Reactant | The starting materials in a chemical reaction. |
| Product | The substances formed from a reaction are products. |
| Law of Conservation of Mass | This law states mass is neither created nor destroyed in ordinary chemical and physical changes |
| Synthesis reaction | A reaction in which two or more substances combine to form one new compound. |
| Decomposition reaction | A reaction in which a single compound breaks down to form two or more simpler substances. |
| Single-displacement reaction | The products of single-displacement reactions are a new compound and a different element. |
| Double-displacement reaction | A reaction in which ions from two compounds exchanged places. |
| Exothermic reaction | A chemical reaction in which energy is released. |
| Endothermic reaction | A chemical reaction in which energy is taken in. |
| Law of Conservation of Energy | States that energy cannot be created or destoryed. |
| Activation energy | The smallest amount of energy that molecules need to react. |
| Inhibitor | A substance that slows down or stops a chemical reaction. |
| Catalyst | A substance that speeds up a reaction without being permanently changed. |