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Chemical Reactions
| Term | Definition |
|---|---|
| Chemical reaction | the process in which one or more substances change to produce one or more different substances |
| Precipitate | a solid that is produced as a result of a chemical reaction in a solustion |
| Chemical formula | a combination of chemical symbols and numbers to represent a substance |
| chemical equation | a representation of a chemical reaction that uses symbols to show the relationship between the reactant and the products |
| reactants | a substance or molecule that participates in a chemical reaction |
| products | the substance that forms in a chemical reaction |
| law of conservation of masss | the law that states that mass cant be created or destroyed in ordinary chemical and physical changes |
| synthesis reaction | a reaction in which two or more substances combine to form a new compound |
| decomposition reaction | a reaction in which a single compound breaks to form two or more simpler substances |
| single- displacement reaction | a reaction in which one element or radical takes the place of another element or radical in a compound |
| double-displacement reaction | a reaction in which a gas, a solid precipitate, or a molecular compound forms from the exchange of ions between two compounds |
| exothermic reaction | a chemical reaction in which heat is released to the surroundings |
| endothermic reaction | a chemical reaction that requires heat |
| law of conversation of energy | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
| activation energy | the minimum amount of energy required to start a chemical reaction |
| inhibitor | a substance that slows down or stops a chemical reaction |
| catalyst | a substance that changes the rate of a chemical reaction without it being used up or changed very much |