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When an insoluble solid forms during a chemical reaction between two solutions, it is called precipitation. In other words, it's when a solid "falls out" or separates from a solution.
A set of guidelines used to predict whether or not an ionic compound will dissolve in water and form a precipitate.
An equation that only includes the species involved in a chemical reaction and excludes spectator ions.
A type of chemical reaction where cations and anions switch partners between two compounds resulting in new products.