1. Chemical Reactions

2. Formation Reaction
2 elements combine to form 1 compound

3. Decomposition Reaction
1 compound breaks into 2 elements (or 2 smaller molecules)
Opposite reaction of a formation

4. Double Replacement Reaction
2 compounds react to form 2 different compounds
Metal ions switch spots (leave the subscripts)

5. Hydrocarbon Combustion Reaction
a hydrocarbon compound burns in the presence of oxygen to produce carbon dioxide and water

6. Acid Base Neutralization
An acid (containing H) reacts with a base (containing OH) to produce water and an ionic compound
Balance afterward!

7. Solubility
Solubility determines the ability of a substance to dissolve (in water)
If a substance is very soluble, it will be aqueous
If a substance is insoluble, it will create a solid precipitate

8. Examples
MgF2
K2CO3
Ca(OH)2
NaCl
CuCl
CuCl2
PbSO4
NH4IO3

9. Balancing Equations
Example (NH4)PO4(aq) + NaOH(aq)  Na3PO4(aq) + NH3(aq) + H2O(l)