When a potassium iodide solution reacts with a lead(II) nitrate solution, a yellow precipitate of lead(II) iodide is formed.Īn important stage of the precipitation process is the onset of nucleation. When a barium chloride solution reacts with sulphuric acid, a white precipitate of barium sulfate is formed. The formation of a precipitate can be caused by a chemical reaction. Precipitation occurs more rapidly from a strongly supersaturated solution.
This can be due to temperature changes, solvent evaporation, or by mixing solvents. The precipitation of a compound may occur when its concentration exceeds its solubility. metallurgy and alloys) when solid impurities segregate from a solid phase. The notion of precipitation can also be extended to other domains of chemistry ( organic chemistry and biochemistry) and even be applied to the solid phases (e.g. The clear liquid remaining above the precipitated or the centrifuged solid phase is also called the supernate or supernatant. In case of an inorganic chemical reaction leading to precipitation, the chemical reagent causing the solid to form is called the precipitant. The solid formed is called the precipitate. In an aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a supersaturated solution. Principle of chemical precipitation in aqueous solution ( Learn how and when to remove this template message) JSTOR ( February 2008) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Precipitation" chemistry – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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