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what is double decomposition reaction?

Reaction between two chemical substances (usually salts in solution) that results in the exchange of a constituent from each compound to create two different compounds.

In a double displacement or metathesis reaction two compounds exchange bonds or ions in order to form different compounds.

AB + CD ? AD + CB

An example of a double displacement reaction occurs between sodium chloride and silver nitrate to form sodium nitrate and silver chloride.

NaCl(aq) + AgNO3(aq) ? NaNO3(aq) + AgCl(s)


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