1. Reaction Rate Introduction

2. Chemical Reactions Reactants  Products Chemical Change
Chemical Equation
Reactants  Products

3. Reaction Rate
What is reaction rate? How can we measure the rate of a reaction?

4. Collision Theory For a chemical reaction to occur:
Reactants must collide
Collision must have sufficient energy to cause a reaction
Activation Energy
Kinetic Energy of reactant particles ↔ Temperature
Reactants must have correct orientation
Discuss activation energy in terms of a match

5. Activation Energy and rate of reaction
Larger Ea slows rate of reaction
An activation barrier present for an exothermic reaction would explain the behavior of such reactions as H2 +O2 

6. What Factors Affect Reaction Rate?
Brainstorm for variables
Guide discussion on controlled and independent variables
Focus on Temperature, mass reactants, volume water, state of tablet

7. Reaction for Lab 3NaHCO3(s) + H3C6H5O7(aq) 
Sodium bicarbonate and citric acid
sodium ions + citrate ions + water + carbon dioxide
3NaHCO3(s) + H3C6H5O7(aq) 
3Na+(aq) + C6H5O7-3(aq) + 3H2O(l) + 3CO2(g)

8. How can we measure the rate of this reaction?
3NaHCO3(s) + H3C6H5O7(aq) 
3Na+(aq) + C6H5O7-3(aq) + 3H2O(l) + 3CO2(g)
Demo gas collection by water displacement

9. Total mass of container (g)
Data Table
Time (s)
Total mass of container (g)
Mass of CO2 (g)