A precipitation reaction is a reaction between two aqueous solutions that results in the formation of A SOLID compound.
A precipitation reaction is a type of reaction in which two solutions containing soluble salts react together to produce an insoluble salt (solid) called 'the precipitate'. The precipitate occurs as a result of the combination of the cations and the anions in the solutions. Precipitation reactions are usually used in chemistry to determine the types of ions that are present in solutions.
