1. Predicting Products of Chemical Reactions.
Identify the type of reaction.
Two elements:
One compound:
One compound,
One element:
Two compounds
Hydrocarbon + O2
Synthesis
Decomposition
Synthesis or Single replacement
Synthesis or Double replacement
Combustion

2. The product is always!!!!!!!!! CO2 + H2O
Combustion reaction
The product is always!!!!!!!!! CO2 + H2O

3. Double Replacement Switch the positive ions: Check Oxidation numbers:
Examples:
HOH + KCl  HCl + KOH
Al2(SO4)3 + NH4ClO3  (NH4)2SO4 + Al(ClO3)2

4. Practice these:
BaCl2 + K2O
MgF2 + Li2O
KI + Pb(NO3)2
FeS + HCl

5. Single Replacement
Determine if the single element is positive or negative.
Replace the same charged element in the compound.
Examples:
Al + Pb(NO3)2  Al(NO3)3 + Pb
Mg + HCl  MgCl2 + H2

6. Practice these:
BaCl2 + K
MgF2 + O2
K + Pb(NO3)2
FeS + Cl2

7. Synthesis If there are only two elements: Ba + S  BaS
Combine them into a binary compound.
Check oxidation number
Examples:
Rb + S  Rb2S
Ba + S  BaS

8. Practice these:
H2 + O2
Mg + Cl2
K + N
Ca + S

9. Synthesis If there are three or more elements: Ca + SO2 + O2  CaSO4
THERE WILL BE AT LEAST ONE POLYATOMIC ION.
ARRANGE THE ELEMENTS INTO A COMMON POLYATOMOC ION. THE OTHER ION IS THE ELEMENT LEFT OVER.
Examples:
H2O + SO2  H2SO4
Ca + SO2 + O2  CaSO4

10. Practice these:
NH3 +H2O 
H2SO3 + O2
CaO + SO2 
MgO + PO3 

11. Decomposition: MgCl2  Mg + Cl2
Products depends on the compound decomposing:
Binary compounds simply break into individual elements:
Examples:
H2O  H2 + O2
MgCl2  Mg + Cl2

12. Practice these:
NH3
SO2
CaO
MgO

13. Hydroxides: Metal hydroxide + H2O NaOH  Na2O + H2O
Examples:
NaOH  Na2O + H2O
Ca(OH)2  CaO + H2O

14. Practice these:
Al(OH)3 
LiOH
Fe(OH)3
CuOH

15. Carbonates: PbCO3  PbO + CO2 Metal oxide + CO2 Examples:
CaCO3  CaO + CO2
PbCO3  PbO + CO2

16. Practice these:
Li2CO3
SrCO3
Cu2CO3
MgCO3

17. Chlorates Metal Chloride + O2 Examples: Ba(ClO3)2  BaCl2 + O2
NaClO3  NaCl + O2
Fe(ClO3)3  FeCl3 + O2

18. Practice these:
LiClO3
Sr(ClO3)2
CuClO3
Mg(ClO3)2