When is a chemical reaction considered a double displacement reaction ? Explain giving example. State a difference between displacement and double displacement reaction .

Explanation

A reaction is considered a double displacement reaction if during the chemical reaction an exchange of ions takes place between two ionic substances.
Example: `BaCl_(2)+Na_(2)SO_(4)rarrBaSO_(4)+2NaCl`
In a displacement reaction, a more reactive element displaces or removes another element from its compound . e.g. `Fe+CuSO_(4)rarrFeSO_(4)+Cu` Whereas in a double displacement reaction, the compounds react by exchanging their ions and from two new compounds.