Metathesis reactions in which a precipitate forms.
many metathesis reactions involve simple ionic combinations to form insoluble compounds (precipitates) in aqueous solutions. for example, if a solution of silver nitrate, AgNO3, is mixed with a solution of potassium chromate, K2CrO4, insoluble silver chromate, AgCrO4, precipitates from the solution. soluble potassium nitrate remains dissolved in water as the follwing molecular equation indicates.