Chemical Reactions: Understanding the 5 Types

Synthesis Reactions

Explanation: In a synthesis reaction, also known as combination or composition, all reactants are added together to form one compound.

Example: A + B → AB

Decomposition Reactions

Explanation: Decomposition reactions start with one reactant, which then breaks down into two or more products.

Example: ABC → AB + C

Single Replacement Reactions

Explanation: In single replacement, or single displacement, a single element is present on both the reactant and product side. Positive charges may trade places.

Example: AB + C → CB + A

Double Replacement Reactions

Explanation: Double replacement reactions involve two compounds producing two new compounds. Positive charges trade places between the compounds.

Example: AB + CD → AD + CB

Complete Combustion Reactions

Explanation: Complete combustion reactions involve a hydrocarbon combining with oxygen to produce carbon dioxide and water.

Example: CH₄ + O₂ → CO₂ + H₂O

To balance it: CH₄ + 2O₂ → CO₂ + 2H₂O