1. Types of Reactions 1.Synthesis reactions 2.Decomposition reactions 3.Single displacement reactions 4.Double displacement reactions 5.Combustion reactions 6.Acid Base reactions You need to be able to identify each type.

2. 1. Synthesis Example C + O 2 OO C +  OO C General: A + B  AB

3. Ex. Synthesis Reaction

4. Practice Balance Na (s) + Cl 2(g)  Mg (s) + F 2(g)  Al (s) + F 2(g)  NaCl (s) MgF 2(s) AlF 3(s)

5. 2. Decomposition Example: NaCl General: AB  A + B  Cl Na Cl + Na

6. Ex. Decomposition Reaction

7. 3. Single Displacement Example: Zn + CuCl 2  Zn Cl Cu + General: AB + C  AC + B Cl Zn Cu + Zn was oxidized Went from neutral (0) to (+2) Cu was reduced Went from (+2) to Neutral (0)

8. Ex. Single Replacement Reaction

9. Single Replacement Reactions Write and balance the following single replacement reaction equation: Zn (s) + HCl (aq)  ZnCl 2 + H 2(g) 2 NaCl (s) + F 2(g)  NaF (s) + Cl 2(g) Al (s) + Cu(NO 3 ) 2(aq)  22 Cu (s) + Al(NO 3 ) 3(aq) 3 23 2

10. 4. Double displacement Example: MgO + CaS General:AB + CD  AD + CB S O  Mg Ca + O S Mg Ca +

11. Double Replacement Reactions Think about it like “foil”ing in algebra, first and last ions go together + inside ions go together Example: AgNO 3(aq) + NaCl (s)  AgCl (s) + NaNO 3(aq) Another example: K 2 SO 4(aq) + Ba(NO 3 ) 2(aq)  KNO 3(aq) + BaSO 4(s) 2

12. 5. Combustion Reactions Combustion reactions - a hydrocarbon reacts with oxygen gas. This is also called burning!!! In order to burn something you need the 3 things in the “fire triangle”: 1) Fuel (hydrocarbon) 2) Oxygen 3) Something to ignite the reaction (spark)

13. Combustion Reactions In general: C x H y + O 2  CO 2 + H 2 O Products are ALWAYS carbon dioxide and water. (although incomplete burning does cause some by-products like carbon monoxide) Combustion is used to heat homes and run automobiles (octane, as in gasoline, is C 8 H 18 )

14. Combustion Example C 5 H 12 + O 2  CO 2 + H 2 O Write the products and balance the following combustion reaction: C 10 H 22 + O 2  5 6 8

15. Acid Base Reactions Looks just like double replacement Acids generally start with H Bases generally end with OH Products are always water and a salt HCl + NaOH  H2O + NaCl H OH HOH or H2O

16. Mixed Practice State the type & balance the reaction 1.BaCl 2 + H 2 SO 4  BaSO4 + HCl 2.C 6 H 12 + O 2  CO2 + H2O 3.Zn + CuSO 4  ZnSO4 + Cu 4.Cs + Br 2  CsBr 5.FeCO 3  CO2 + Fe