1. Reaction Types

3. Synthesis
A + B → AB
Two or more elements or compounds combine to form a single new compound
Examples
H2 + O2 → H2O
CO + O2 → CO2
CaO + H2O → Ca(OH)2

4. Decomposition
AB → A + B
Single compound breaks down into two or more simpler substances
Catalyst – substance that speeds up a reaction without altering it

5. Decomposition Examples
HgO → Hg + O2
NaCl → Na + Cl2

6. Combustion Reactions Hydrocarbon- compound of C, H and sometimes O
Hydrocarbons combine with oxygen to form carbon dioxide and water
Examples
CH4 + O2 → CO H2O
C2H8 + O2 → CO H2O
C6H12O6 + O2 → CO H2O

7. Determine What Type of Reaction Each Is, Complete, and Balance
H2 + O2 →
Na + Cl2 →
Al2O3 →
C12H O2 →
CO →
NH3 + HCl →
CCl4 →