Studied by 1 person
Physical Change
Alters state or appearance, not composition.
Chemical Change
Alters composition, forming new substances.
Chemical Reaction
Produces new substances through atom rearrangement.
Evidence of Chemical Reaction
Includes color change, gas formation, heat change.
Chemical Equation
Describes reactants and products in a reaction.
Reactants
Substances consumed in a chemical reaction.
Products
Substances formed in a chemical reaction.
Balancing Chemical Equations
Ensures equal atom count in reactants and products.
Coefficients
Numbers used to balance chemical equations.
Combustion Reaction
Reaction with O2, releasing energy.
Combination Reaction
Two or more reactants form a single product.
Decomposition Reaction
Single reactant breaks into multiple products.
Single Replacement Reaction
One element replaces another in a compound.
Double Replacement Reaction
Two compounds exchange elements or ions.
Stoichiometry
Relationship between reactants and products amounts.
Stoichiometric Coefficients
Indicate relative moles in a reaction.
Limiting Reagent
Reactant completely consumed, limiting product formation.
Excess Reagent
Reactant not fully consumed in a reaction.
Theoretical Yield
Predicted amount of product from stoichiometry.
Actual Yield
Amount of product actually produced.
Percent Yield
(Actual Yield/Theoretical Yield) x 100.
Balanced Equation
Same number of each atom on both sides.
Physical States
(s) solid, (l) liquid, (g) gas, (aq) aqueous.
Law of Conservation of Mass
Mass is conserved in chemical reactions.
Heat Absorption
Energy change indicating a chemical reaction.
Formation of Solid
Precipitate forms during a chemical reaction.
Gas Formation
Bubbles or vapor indicate a chemical change.
