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

2. 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 ________________________

3. 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 ____________________________________________ ____________________________________________ ________________________.

4. 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 ____________________________________________ ____________________________________________ ________________.

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

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

7. 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.