Question | Answer |
chemical reaction | produces new substances by changing how atoms are arranged |
reactants | substances present when a chemical reaction starts |
products | substances formed (produced) by a chemical reaction |
catalyst | substance that speeds up a chemical reaction but is not consumed in the reaction |
coefficient | the number of molecules of a substance in a chemical reaction |
law of conservation of mass | atoms are not created or destroyed by chemical reactions |
The CPGT Indications of a Chemical Reaction | *Color change
*formation of a Precipitate (solid product)
*formation of a Gas
*Temperature change |
synthesis reaction | new compound is formed from the combination of simpler reactants:
A + B ---> AB |
decomposition reaction | reactant breaks down into simpler products:
AB ---> A + B |
combustion | chemical reaction in which a substance reacts with oxygen, usually with the rapid release of heat and the production of a flame, such as the burning of methane gas |
single replacement reaction | during a chemical reaction, one element replaces another in a compound:
A + BC ---> AC + B |
double replacement reaction | during a chemical reaction, two elements replace each other in different compounds:
AB + CD ---> AD + CB |
endothermic reaction
(Endo's AEDT!) | chemical reaction that Absorbs surrounding Energy producing a Decrease in Temperature of the reaction mixture:
REACTANTS + ENERGY ---> PRODUCTS |
exothermic reaction
(Exo's REIT!) | chemical reaction that Releases Energy producing an Increase in Temperature of the reaction mixture:
REACTANTS ---> PRODUCTS + ENERGY |
The CSTC Factors that Affect the Rate of Chemical Reactions | *Concentration
*Surface size
*Temperature
*Catalyst |
brilliant | what you are :) |
activation energy | the minimum amount of energy needed to start a chemical reaction |