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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. |