1. Jss Unit 3 Chemical Reactions 3.2 What are the different types of reactions? February 7, 2010 Do Now: 1.Identify the reactants and the products in the following reaction 2. How many of the following elements do you have on each side of the chemical reaction? 3. Using the law of conservation of mass explain what happens to the mass of the chemicals after they react. 2NaClO 3  2NaCl + 3O 2 AIM: How are the four types of chemical reactions different? ElementReactants SideProducts Side Na Cl O REACTANTS PRODUCTS 2 2 22 6 6 Matter cannot be created or destroyed, therefore the mass of reactants must equal the mass of the products.

2. Types of Reactions “The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.” -Carl Gustav Jung, ca. 1920

3. What are the types of reactions? Synthesis: when two or more reactants combine to form a single product. A + B  AB General Formula:

4. What are the types of reactions? Decomposition: when a single compound is broken down into two or more simpler substances AB  A + B General Formula:

5. What are the types of reactions? Single Replacement: when one element replaces another element in a compound A + BC  AB + C General Formula:

6. What are the types of reactions? Double Replacement: when two compounds are mixed together and the elements in the compound switch places AB + CD  AD + CB General Formula:

7. SHALL WE DANCE?

8. Shall we dance? At your table, complete the activity in your packet. 1.Read each paragraph carefully 2.Answer questions that follow 15 minutes

9. A = ADAM B = BARBARA +  A +  B ABAB 1. Represent the joining of Adam and Barbara during the dance. Use A to represent Adam and B to represent Barbara.

10. 2. If A and B represent elements, can you describe what is happening? Element A combines with Element B to form compound AB. 3. How would you classify A and B using the Types of Reactions? A and B underwent a SYNTHESIS reaction.

11. The dance continues…

13. The dance continues

14. Complete the Independent Practice -IP will be collected at the end of class!!! -HOMEWORK PACKET -Make up LABS!!