| A | B |
|---|
| reactant | substance that undergoes reaction |
| product | new substance formed when reactants undergo chemical change |
| coefficient | number placed in front of the parts of a chemical equation to indicate how many are involved; always a positive # |
| synthesis | name applied to a reaction in which 2 or more substances combine to form a single product |
| decomposition | name applied to a reaction where a compound breaks down into 2 or more simpler substances |
| single displacement | type of reaction in ehich one element takes the place of another in a compound |
| double displacement | type of reaction in which the positive and negative portions of 2 ionic compounds are interchanged; at least one product must be a water or a precipitate |
| combustion | term for a reaction in which a substance rapidly combines with O2 to form one or more oxides |
| equilibrium | term for a system where no net change occurs in the amount of reactants or products |
| dynamic equilibrium | term describing a system in which opposite reactions are taking place at the same rate |
| Le Chatelier's principle | states that if a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress |
| soluble | term describing a substance that dissolves in a liquid |
| insoluble | term describing a compound that does not dissolve in a liquid |
| activation energy | amount of energy the particles in a reaction must have when they collide for the reaction to occur |
| concentration | the amount of a substance present in a unit volume |
| limiting reactant | the reactant of which there is not enough; when it is used up, the reaction stopes and no new product is formed |
| catalyst | substance that speeds up the rate of a reaction without being used up itself or permanently changed |
| enzyme | biological catalyst |
| inhibitor | substance that slows down the reaction |
