Rate of reaction is measured as decrease in reactant concentration over time. Rate of reaction is directly proportional to reactant concentration. Rate equation: Rate = k[A]m[B]n, where k is rate constant
Chemical kinetics studies reaction rates under varying conditions. Forensic chemists use chemical reactions to determine death time and method
Reactions occur when reactant molecules effectively collide. Correct orientation and minimum kinetic energy are required for effective collisions. Activation energy (Ea) determines the minimum energy needed for collisions
Reaction mechanism describes sequence of events from reactants to products. Elementary steps involve one, two, or rarely three chemical species. Useful mechanism must agree with experimental rate law but cannot be proven absolutely
Chemical reaction involves breaking and forming new bonds between reactant molecules. Reactants are initial substances, products are final substances. Chemical equations show reactants on left and products on right