https://ideawaza.com/api.php?action=feedcontributions&feedformat=atom&user=211.28.152.231 2026-09-29T16:54:21Z User contributions MediaWiki 1.46.0 https://ideawaza.com/index.php?title=Precipitation_(chemistry)&diff=19084 2005-11-07T06:52:59Z

<p>211.28.152.231: </p> <hr /> <div>: &quot;Precipitate&quot; redirects here, for the [[Interpol (band)|Interpol]] [[Extended play|EP]] see [[Precipitate (EP)]]<br /> <br /> '''Precipitation''' is the condensation of a [[solid]] from a [[solution]] during a [[chemical reaction]]. This occurs when the solution is [[supersaturated]] (this includes the obvious case that an [[solubility|insoluble]] compound is present). In this situation, the solid forms from the solute phase, and usually sinks to the bottom of the solution (though it will float if less dense than the solvent). <br /> <br /> This effect is useful in many industrial and scientific applications whereby a chemical reaction may produce a solid that can be collected from the solution by various methods (e.g. filtration, decanting, centrifuging). Precipitation from a [[solid solution]] is also a useful way to [[precipitation strengthening|strengthen]] [[alloy]]s.<br /> <br /> An important stage of the precipitation process is the onset of [[nucleation]]. The creation of a hypothetical solid particle includes the formation of an interface, which requires some energy based on the relative [[surface energy]] of the solid and the solution. If this energy is not available, and no suitable nucleation surface is available, [[supersaturation]] occurs.<br /> <br /> ==Cation sensitivity==<br /> Precipitate formation is useful in detecting the type of [[cation]] in an unknown [[salt]]. To do this, an [[alkali]] first reacts with the unknown salt to produce a precipitate which is the hydroxide of the unknown salt. <br /> <br /> To identify the cation, the colour of the precipitate and its solubility in excess are noted.<br /> <br /> Similar processes are often used to separate chemically similar elements, such as the [[rare earth]] metals.<br /> <br /> ==External links==<br /> * http://www.hci.edu.sg/~limth/lessons/2002/qa/cations.htm<br /> [[Category:Chemical processes]]<br /> <br /> [[de:Fällungsreaktion]]<br /> [[es:Precipitado]]<br /> [[ja:%E6%B2%88%E6%AE%BF]]<br /> [[nl:Neerslag (scheikunde)]]<br /> [[zh:沉淀]]</div>

211.28.152.231 https://ideawaza.com/index.php?title=Precipitation_(chemistry)&diff=19083 2005-11-07T06:52:44Z

<p>211.28.152.231: </p> <hr /> <div>EVERYONE IS GAY!!! :)<br /> <br /> : &quot;Precipitate&quot; redirects here, for the [[Interpol (band)|Interpol]] [[Extended play|EP]] see [[Precipitate (EP)]]<br /> <br /> '''Precipitation''' is the condensation of a [[solid]] from a [[solution]] during a [[chemical reaction]]. This occurs when the solution is [[supersaturated]] (this includes the obvious case that an [[solubility|insoluble]] compound is present). In this situation, the solid forms from the solute phase, and usually sinks to the bottom of the solution (though it will float if less dense than the solvent). <br /> <br /> This effect is useful in many industrial and scientific applications whereby a chemical reaction may produce a solid that can be collected from the solution by various methods (e.g. filtration, decanting, centrifuging). Precipitation from a [[solid solution]] is also a useful way to [[precipitation strengthening|strengthen]] [[alloy]]s.<br /> <br /> An important stage of the precipitation process is the onset of [[nucleation]]. The creation of a hypothetical solid particle includes the formation of an interface, which requires some energy based on the relative [[surface energy]] of the solid and the solution. If this energy is not available, and no suitable nucleation surface is available, [[supersaturation]] occurs.<br /> <br /> ==Cation sensitivity==<br /> Precipitate formation is useful in detecting the type of [[cation]] in an unknown [[salt]]. To do this, an [[alkali]] first reacts with the unknown salt to produce a precipitate which is the hydroxide of the unknown salt. <br /> <br /> To identify the cation, the colour of the precipitate and its solubility in excess are noted.<br /> <br /> Similar processes are often used to separate chemically similar elements, such as the [[rare earth]] metals.<br /> <br /> ==External links==<br /> * http://www.hci.edu.sg/~limth/lessons/2002/qa/cations.htm<br /> [[Category:Chemical processes]]<br /> <br /> [[de:Fällungsreaktion]]<br /> [[es:Precipitado]]<br /> [[ja:%E6%B2%88%E6%AE%BF]]<br /> [[nl:Neerslag (scheikunde)]]<br /> [[zh:沉淀]]</div>

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