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Chemical Reactions
Term | Definition |
---|---|
Chemical Reaction | a process in which one or more subsatnces change to make one or more substances |
Precipitate | a solid substance that if 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 |
Law of conservation of mass | the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes |
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 | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
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 |
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 | 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 ions from two compounds exchange places |