A salt metathesis reaction, also known as a double displacement reaction, is a chemical reaction in which two chemical species exchange bonds, resulting in the formation of products having comparable or equal bonding affiliations. The overall scheme for this reaction is as follows:
AB+CD = AD+CB
The bond between the reacting species can be ionic or covalent. These reactions usually culminate in the precipitation of a single product.
following are the examples of Double displacement reaction: