Example:
In a double replacement reaction the metal in one of the reactants will replace the metal in the other reactant. The metals exchange places with each other.
AB + CD ---> AD + BC
LiBr + NaCl ---> NaBr + LiCl
A special kind of double replacement reaction is called a neutralization reaction. It occurs between an strong acid and a strong base that produces a neutral solution containing a salt and water.
HCl + NaOH ---> NaCl + H2O