Types of Chemical Reactions

• Combination Reaction

• Two or more substances combine.

• Forms one new substance.

• A + B → AB

• Decomposition Reaction

• One compound breaks apart.

• Forms two or more simpler substances.

• Needs heat, light, or electricity.

• AB → A + B

• Displacement Reaction

• A displacement reaction is a chemical reaction in which a more reactive element replaces a less reactive element from a compound.

  General equation:

  A + BC → AC + B

• Combustion Reaction

• A substance reacts with oxygen.

• Produces heat and light.

• Usually forms carbon dioxide and water (when fuels burn).