1. Types of Chemical Reactions
Chapter 8

2. Types of Chemical Reactions
General Equations
Combination aka synthesis
A + B  AB
There are five general types of chemical reactions.
1.- Combination reaction: Two or substances combine to form a single substance
Example:
2 K Cl2  2 KCL

3. Decomposition
AB  A + B
Decomposition Reaction: A single compound is broken down into two or more products. The products can be any combination of elements and compounds.
Example:
CaCO3  CaO + CO2
2 H2O  2 H O2

4. Single- Replacement Reaction AKA single- displacement
A + BC  AC + B
Single-Replacement Reaction: One element replaces a second element in a compound.
Examples
Mg + Zn(NO3)2  Mg(NO3) Zn
Mg + LiNO3  No reaction
AgNO3 + Cu  CuNO3 + Ag

5. Double- Replacement AKA double- displacement
AB + CD -> AD + CB
Precipitate
Double-Replacement: Involves an exchange of positive ions between two reaction compounds. Usually, between two ionic compounds in aqueous solutions, and often are characterized by the production (formation) of a precipitate(a solid).

6. Combustion Reaction:
Hydrocarbon Combustion Reaction
CXHY + O2CO2 + H2O
Combustion Reaction: An element of compound reacts with oxygen often producing energy as heat and light. Combustion reactions commonly involve hydrocarbons. The complete combustion of a hydrocarbon produces carbon dioxide and water.
Examples:
2 Mg + O2  2 MgO
CH4 + O2  CO H2O