1. Chemical Reactions
Types of Reactions

2. Types of Reactions Decomposition Reactions
A compound breaks down into two or more simple substances.
AB  A + B

3. Types of Reactions Synthesis Reactions
Two or more substances combine to form a single product.
A + B  AB
Zn + I  ZnI

4. Types of Reactions Single-displacement (replacement) Reactions
One single element takes the place of another element in a compound.
A + BC  B + AC

5. Types of Reactions Double-displacement (replacement) Reactions
The positive portions of two ionic compounds are interchanged.
AB + CD  CB + AD

6. Types of Reactions Acid/Base Reaction
Neutralization reaction between an acid and a base. ALWAYS involves a hydrogen ion (H+) in an acid on the reactant side. H2O is ALWAYS a product.

7. Types of Reactions Combustion
A substance rapidly combines with oxygen to form one or more oxides.
O2 is always a reactant and H2O is always a product.
Results in a flame.
Methane
Oxygen
Carbon Dioxide
Water

8. Types of Reactions
Combustion Reactions
A + O  AO (oxide)

9. Types of Reactions Redox Reactions Oxidation-Reduction Reaction
Classified by the transfer of electrons from one atom to another.