1. 23.3 – Classifying Chemical Reactions

2. Objectives Identify the general types of chemical reactions. Predict which metals will replace other metals in a compound.

3. Synthesis Reaction Two or more substances form a new substance A + B  C

4. Decomposition reaction One substance breaks down into two or more substances AB  A + B

5. Single-Displacement Reaction One element replaces another one in a compound A + BC  AC + B D + BC  BD + C

6. Double-Displacement Reaction Results if a precipitate, water, or a gas forms when two ionic compounds in solution are combined AB + CD  AD + CB

7. Activity Series In single displacement reactions, more reactive metals can replace less reactive metals Most reactive – lithium, potassium, sodium Least reactive – gold, silver, copper

8. Synthesis A + B  AB Na + Cl 2  NaCl Decomposition AB  A + B 2NaCl  2Na + Cl 2 Single-Displacement A + BX  AX + B Mg + CuSO 4  Cu + MgSO 4 Double-displacement AX + BY  AY + BX CaCO 3 + HCl  CaCl 2 + H 2 CO 3

9. Combustion Reaction Type of synthesis reaction that produces heat and light –Involves a carbon compound plus oxygen gas to produce carbon dioxide and water 2 C 2 H 6 + 7 O 2  4 CO 2 + 6 H 2 O

10. Video http://www.youtube.com/watch?v =i-HHvx1VC_8http://www.youtube.com/watch?v =i-HHvx1VC_8

11. In-Class Assignment/Homework 23.3 WKT