Types of Chemical Reactions
Audrey Bowling
Synthesis
Definition: reaction in which two or more substances react to form a single substance.
Equation: 2Na + Cl2 ----> 2NaCl
Ex: hydrogen and oxygen react to make water.
Decomposition
Definition: reaction in which a compound is broken down into two or more substances.
Equation: 2H2O ----> 2H2 + O2
Ex: When electricity passes through water and turns into hydrogen.
Single Replacement
Definition: reaction in which one substance is traded for another substance.
Equation: Cu + 2AgNO3 ---> 2Ag + Cu(NO3)2
Ex: Copper replaces silver in silver nitrate to create copper nitrate.
Double Replacement
Definition: Two different compounds exchange positive ions and form two new compounds.
Equation: Pb(NO3)2 + 2KI ---> PbI2 + 2KNO3
Ex: When Potassium Iodide solution is poured into a Lead Nitrate solution.
Combustion
Definition: Reaction in which a substance reacts with oxygen and creates heat or light.
Equation: CH4 + 2O2 ---> CO2 + 2H2O
Ex: When methane burns in an unlimited supply of oxygen.