https://ideawaza.com/api.php?action=feedcontributions&feedformat=atom&user=202.156.2.82 2026-09-30T19:24:59Z User contributions MediaWiki 1.46.0 https://ideawaza.com/index.php?title=Precipitation_(chemistry)&diff=19066 2005-02-17T08:08:40Z

<p>202.156.2.82: /* External links */</p> <hr /> <div>'''Precipitation''' is the condensation of a [[solid]] from a [[solution]] during a [[chemical reaction]]. This occurs when the solution is [[supersaturated]], whereupon the solid forms from the solute phase, and usually sinks to the bottom of the solution. <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).<br /> <br /> ==Detection of cations==<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 /> ==External links==<br /> * http://www.hci.edu.sg/~limth/lessons/2002/qa/cations.htm<br /> [[Category:Chemistry]]</div>

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