Types of Reactions

The Six Different Types of Reactions Synthesis Reaction Decomposition Reaction Single Replacement Reaction Double Replacement Reaction Combustion Reaction Oxidation-Reduction Reaction

A + B  AB Synthesis Reaction A reaction where two or more substances react to produce one substance The reactants can be either elements or compounds A + B  AB

Synthesis Reaction 2Na + Cl2  2NaCl A B A B

Decomposition Reaction A reaction in which a compound breaks down into two or more simpler substances The products may be elements or compounds AB  A + B

Decomposition Reaction 2H2O  2H2 + O2 A B A B

Single Replacement Reaction A reaction in which one element takes the place of another element in a compound A + BC  B + AC

Single Replacement Reaction 2K + 2H2O  H2 + 2KOH The Potassium (K) replaces the Hydrogen in water (H2O) to form Potassium Hydroxide (KOH) A B C B A C

Double Replacement Reaction A reaction in which two different compounds exchange ions and create two new compounds AB + CD  AD CB

Double Replacement Reaction CaCO3 + 2HCl  CaCl2 + H2CO3 A B C D A D C B

Combustion Reaction A reaction in which a substance reacts rapidly with oxygen This often producing heat and light Combustion reactions usually produce a compound + H2O

Combustion Reaction CH4 + 2O2  CO2 + 2H2O Methane reacting with oxygen to produce Carbon Dioxide and H2O CH4 + 2O2  CO2 + 2H2O

Oxidation - Reduction Oxidation – Reduction reactions involve an atom or molecule losing or gaining an electron Usually involves a metal and oxygen

Oxidation - Reduction The Oxidation-Reduction reaction between Iron and Oxygen is often known as Rust