Reaction Types

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CombustionOxygen reacts and produces CO2 and

H2O

General Reaction: CxHx + O2 CO2 + H2O

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Synthesis, CombinationTwo or more simple compounds combine

to form a more complicated one.

A + B AB

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Decomposition

A complex molecule breaks down to make simpler ones (opposite of

synthesis).

AB A + B

Single Displacement

One element trades places with another element in a compound.

A + BC AC + B

Double DisplacementThe anions and cations of two

different molecules switch places, forming two entirely different

compounds.

AB + CD AD + CB

Fe is oxidized

Cu is reduced

Redox Reaction

OiL RiGOxidation IsLosing electronsReductionIsGaining Electrons

Fe + Cu2+ Fe2+ + Cu

Acid-Base

React to form “Salt” and Water

Example: HBr + KOH H2O + KBr

Balancing ReactionsLaw of Conservation of Mass - Same number of atoms on eachUse coefficients (numbers in front) to balance the equations.

___Al + ___FeCl2 → ___AlCl3 +___Fe

1 Al Al 1

1 Fe Fe 1

2 Cl Cl 3