1. Types of Reactions You need to be able to identify each type.
Synthesis reactions
Decomposition reactions
Single displacement reactions
Double displacement reactions
Combustion reactions
You need to be able to identify each type.

2. 1. Synthesis
Example C + O2 O C +  O C
General: A + B  AB

3. Ex. Synthesis Reaction

4. Synthesis (Combination) Reactions
A chemical reaction in which a compound is formed from simpler materials
2H2(g) + O2(g) --- 2H2O(l)
2Na(s) + Cl2(g) --- 2NaCl(s)
Mg(s) + F2(g) --- MgF2(s)

5. Practice Predict the products. Na(s) + Cl2(g)  Mg(s) + F2(g) 
Al(s) + F2(g)  2 2
NaCl(s)
MgF2(s) 2 3 2
AlF3(s)
Now, balance them.

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

7. Ex. Decomposition Reaction

8. Decomposition Reactions
A chemical reaction in which a compound is broken down into simpler compounds, or to the component elements.
2NaCl(l) --- 2Na(l) + Cl2(g)
2H2O(s) --- 2Hg(l) + O2(g)

9. Went from neutral (0) to (+2) Went from (+2) to Neutral (0)
3. Single Displacement
Example: Zn + CuCl2
Zn was oxidized
Went from neutral (0) to (+2)  Zn Cl Cu + Cl Zn Cu +
Cu was reduced
Went from (+2) to Neutral (0)
General: AB + C  AC + B

10. Ex. Single Replacement Reaction

11. Single Replacement Reactions
Write and balance the following single replacement reaction equation:
Zn(s) HCl(aq)  ZnCl2 + H2(g) 2
NaCl(s) + F2(g)  NaF(s) + Cl2(g)
Al(s)+ Cu(NO3)2(aq) 2 2 2 3 3
Cu(s)+ Al(NO3)3(aq) 2

12. 4. Double displacement General: AB + CD  AD + CB Example: MgO + CaS 

13. Double Replacement Reactions
Think about it like “foil”ing in algebra, first and last ions go together + inside ions go together
Example:
AgNO3(aq) + NaCl(s)  AgCl(s) + NaNO3(aq)
Another example:
K2SO4(aq) + Ba(NO3)2(aq)  KNO3(aq) + BaSO4(s) 2

14. Practice Predict the products. HCl(aq) + AgNO3(aq) 
CaCl2(aq) + Na3PO4(aq) 
Pb(NO3)2(aq) + BaCl2(aq) 
FeCl3(aq) + NaOH(aq) 
H2SO4(aq) + NaOH(aq) 
KOH(aq) + CuSO4(aq) 

15. 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)

16. Combustion Reactions In general: CxHy + O2  CO2 + H2O
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 C8H18)

17. Combustion Reactions
Chemical reactions that involve oxygen to produce energy (heat) so rapidly that a flame results.
*Special class of oxidation-reduction reactions
**Water and CO2 are products!!
C3H8(g) + 5O2(g) --- 3CO2(g) + 4H2O(g)
C(s) + O2(g) --- CO2(g)

18. Combustion
Example
C5H O2  CO2 + H2O
Write the products and balance the following combustion reaction:
C10H O2  8 5 6

19. Mixed Practice State the type & predict the products. BaCl2 + H2SO4 
C6H12 + O2 
Zn + CuSO4 
Cs + Br2 
FeCO3 

20. Chemical Reactions
Precipitation Reactions
Oxidation-Reduction Reactions
Acid-Base Reactions
Combustion Reactions
Decomposition Reactions
Synthesis Reactions