1. II. Types of Reactions

2. A. Synthesis (Combination) Reaction
When two or more simple compounds/atoms combine to form 1 complex compounds
A + B  AB
Ex: 8Fe + S8  8FeS

3. B. Decomposition Reaction
Opposite of synthesis
1 complex compound becomes two or more simple compounds/atoms
AB  A + B
Ex: H2O2  H2 + O2

4. C. Combustion Reaction
Hydrocarbon reacts with oxygen to produce carbon dioxide and water
Exothermic reaction (heat is released)
Example: CH4 + 2O2  CO2 + 2H2O

5. D. Single Replacement (Steal Yo Girl) Reaction
One atom replaces another atom in a compound.
A + BC  AC + B
Example: 2Al + 6HCl  2AlCl3 + 3H2

6. E. Double Replacement (Dance Partners) Reaction
Cations and anions of two compounds switch places
AB + CD  AD + CB
Ex: Pb(NO3)2 + 2KI  PbI2 + 2KNO3