1. Chemical
Reactions

2. 5 types of reactions: Combination/Synthesis Decomposition
Combustion
Single Displacement
Double Displacement

3. Double displacement reactions occur when cations from each reactant swap places to form ionic compounds with the opposing anions.
AB + CD  AD + CB
Examples:
KCl + AgNO3  AgCl + KNO3
Ca(OH)2 + HCl  H2O + CaCl2

4. Combustion reactions can be identified from the following indicators:
Oxygen is always a reactant
Often release heat and light as they occur
Carbon dioxide and water are products
Examples:
C3H8 + O2  CO2 + H2O

5. Practice
C2H4 + O2  CO2 + H2O
Combustion

6. Practice
NaBr + H3PO4  Na3PO4 + HBr
Double Displacement

7. Ca(OH)2 + Al2(SO4)3  CaSO4 + Al(OH)3
Practice
Ca(OH)2 + Al2(SO4)3  CaSO4 + Al(OH)3
Double Displacement