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Representation using chemical equations
See also: solubility product
An example of a precipitation reaction: Aqueous silver nitrate (AgNO3) is added to a solution containing potassium chloride (KCl), the precipitation of a white solid, silver chloride (AgCl), is observed. (Zumdahl, 2005)

{\displaystyle {\ce {AgNO3 + KCl -> AgCl (v) + KNO3}}} {\displaystyle {\ce {AgNO3 + KCl -> AgCl (v) + KNO3}}}
The silver chloride (AgCl) has formed a solid, which is observed as a precipitate.

This reaction can be written emphasizing the dissociated ions in a combined solution. This is known as the ionic equation.

{\displaystyle {\ce {Ag+ + NO3^- + K+ + Cl^- -> AgCl (v) + K+ + NO3^-}}} {\displaystyle {\ce {Ag+ + NO3^- + K+ + Cl^- -> AgCl (v) + K+ + NO3^-}}}
A final way to represent a precipitate reaction is known as a net ionic reaction.

Precipitate colors