302precipitation

302precipitation - Precipitation Reactions Glenn V. Lo...

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    Precipitation Reactions Glenn V. Lo Department of Physical Sciences Nicholls State University
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    Precipitation Reactions When ions in aqueous solutions react to  produces a product that is insoluble, what  happens? The insoluble product comes out of solution and  makes the solution look cloudy. The insoluble product eventually settles or “falls” to  the bottom of the container (test tube). The  insoluble is called a  precipitate . Example:  http://www.nicholls.edu/phsc/chemdl/aqrxn/slide12.exe In the chemical equation, (s) is indicated next  to the formula of a precipitate.
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    Recognizing precipitation  eqns Which of the following chemical  equations represent a precipitation  reaction? Identify the precipitate. NaCl(aq) + AgNO 3 (aq)   NaNO 3 (aq) + AgCl(s) Ca 2+ (aq) + CO 3 2- (aq)    CaCO 3 (s) 2 Mg(s) + O 2 (g)   2 MgO(s) NaOH(aq) + HCl(aq)   NaCl(aq) + H 2 O(l)
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This note was uploaded on 06/11/2009 for the course CHEM 105 taught by Professor Wessel during the Spring '08 term at Nicholls State.

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302precipitation - Precipitation Reactions Glenn V. Lo...

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