What is an example of a double displacement reaction?
Double displacement reactions commonly involve ionic compounds; each cation starts out combined with one anion and ends up combined with the other reactant's anion. Examples given in the explanation.
In water solvent (precipitation of silver chloride):
In water solvent (one method for production of sodium hydroxide):
In liquid ammonia solvent (precipitation of potassium chloride) -- note the differeent solubility relationships in ammonia versus water which make the first example go in reverse: