Understanding Chemical Reaction Rates: Study Pack #5

1. Today’s Agenda… • Finish notes & discussion from yesterday • Edit multiple choice • New multiple choice questions about chemical reactions • Introduction to Reaction Rate

2. Reaction Rate Study Pack #5

3. Chemical Reactions • When the particles in your reactants bump into each other a chemical reaction can occur • Think about when baking soda particles bump into vinegar particles!

4. Chemical Reactions • If we can get more particles to bump into each other more often, we can speed up a chemical reaction!

5. Reaction Rate • A reaction rate is the speed at which a reaction occurs • Chemical reactions do not all occur at the same rate • Some happen faster and some slower • Example: Compare the chemical reaction in a match to that of spoiling food • How fast a reaction happens depends on how easily the particles can get together to make a reaction occur

6. Reaction Rate • If a reaction has a low rate, that means the particles get together and react at slower speeds than a reaction with a high rate • The reaction rate depends on what types of particles are reacting

7. Rates of Chemical Reactions • Reaction rate also depends on other factors • Factors that affect the rate of a chemical reaction are: • Concentration • Surface area • Temperature

8. Rates of Chemical Reaction • Concentration is how much of one substances is in a certain volume of another • Let’s look at an example!

9. Exit Slip • How did concentration affect the reaction rate of the chemical reaction that you saw on the video? Justify your answer!