What things affect the rate of reactions? The need for speed What things affect the rate of reactions?

Video – Speeding up a chemical reaction List the 5 methods to speed up a chemical reaction: __________________ container or ___________________ concentration. Increase number of ______________________. Speed up the particles by adding _________________.. Break up clumps into ___________________________. Use a ________________________

What affects the rates of reactions? For a reaction to occur, particles of the reactants must ___________________. Reaction rates are affected by _______________________________________________ ____. Factors that affect reaction rates include ____________________________________________ ____________________________________________ ________________________.

Concentration At higher concentrations, there are more ________________ in a given volume. The reactants are more likely to collide and react. The reaction rate is higher when ____________________________________________ ____________________________________________ ________________.

Surface Area The reaction rate increases when ____________________________________________ ____________________________________________ ______. Crushing solids increases their ____________________________________________ _______________________________________.

Temperature Reactions usually occur ____________________________________________ ________________________________________. Because the reactant particles move more ______________________, they are more likely to _________________ and __________________.

Catalysts A catalyst is a substance that changed the rate of a chemical reaction without being used up or changed very much. Catalysts can ____________________________________________ ____________________________________________ _________________. Enzymes are a type of catalyst found in living things.