1. Warm-up Balance the following equations: Ca (s) + F2 (g) CaF2 (s)
N2 (g) + H2 (g) NH3 (g)
Na (s) + H2O (l)  NaOH (aq) + H2 (g)
C2H6 (g) + O2 (g)  CO2 (g) + H2O (l)

2. Predicting Products: Combustion, Synthesis, and Decomposition
Day 3

3. Combustion So, predicting products is pretty simple.
A Carbon containing compound reacts with oxygen. Carbon dioxide and water are always your products!
So, predicting products is pretty simple.
C6H12O6 + O2  H2O + CO2

4. Combustion Products will always be CO2 and H2O
Look for a carbon containing compound and O2 as a reactants.
The only work you have to do is balance the equation correctly.

5. Synthesis
Remember a synthesis reaction is when two substances combine to form a new substance.
Couple forms 
Ex. 4Fe + 3O2  2Fe2O3

6. Steps for Predicting Products.
Figure out the ions (charges) of the reactants.
Cross charges to predict product.
Write predicted product on products side.
Balance equation.

7. Example Na + Cl2  2Na + Cl2  2NaCl K+Br2  2K+Br2  2KBr Mg + O2 
2Mg + O2  2MgO

8. Decomposition Something breaks apart into individual pieces.
Opposite of synthesis reactions.
Couple breaks up 
Ex. 2NaCl  2Na + Cl2

9. Decomposition You need to know four types Binary Metallic Carbonates
Metallic Hydroxides
Metallic Chlorates

10. Binary Decomposition A compound breaks up into its elements AB  A + B
2NaCl  2Na + Cl2
Exact opposite of synthesis!

11. Metallic Carbonates Decompose into the metal oxide and Carbon Dioxide
MCO3  MO + CO2
PbCO3  PbO + CO2

12. Metallic Hydroxides Decompose into the metal oxide and water
MOH  MO + H2O
Pb(OH)2  PbO + H2O

13. Metallic Chlorates Decompose into the metal chloride and oxygen gas
MClO3  MCl + O2
Pb(ClO3)2  PbCl2 + 3O2

14. Key Things to Remember
Determine the type of compound before trying to predict the products!!
Use the “Guidelines for Predicting the Products of selected Types of Chemical Reaction” reference sheet

15. Practice
Cu(OH)2 
Li + O2 
CaCl2 
Mg + Cl2 

16. Practice CH4 + O2  CH4 + 2O2  CO2 + 2H2O Cs + F2  2Cs + F2  2CsF
Ba + Cl2 
Ba + Cl2  BaCl2
C3H8 + O2 
C3H8 + 5O2  3CO2 + 4H2O