ACEE219_Week10_new

ACEE219_Week10_new - ACEE ACEE 219 Environmental Chemistry...

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ACEE 219 Environmental Chemistry Week 10 May 4, 2010 novation Hall 127 ACEE 219 Spring 2010 HDP 1 Innovation Hall 127
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issolution Dissolution http://www.uwec.edu/boulteje/Boulter103Notes/30October_files/image034.jpg Dissolution is the process by which a solid forms a homogeneous mixture with solvent (solution) ACEE 219 Spring 2010 HDP 2 a solvent (solution).
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recipitation Precipitation http://www.uwec.edu/boulteje/Boulter103Notes/30October.htm Precipitation is the formation of a solid in a solution during association of active components (i e ions) ACEE 219 Spring 2010 HDP 3 reactive components (i.e., ions).
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ock weathering Rock weathering Weathering is the alteration of rocks to more stable material from their exposure to the agents of air, water , and organic fluids. echanical weathering cludes processes that Mechanical weathering includes processes that fragment and disintegrate rocks into smaller pieces without changing the rock's mineral composition. Chemical weathering is the alteration of the rock into new minerals. Both pathways constitute weathering, but one process may dominate over the other. py http://www.waterencyclopedia.com/Tw-Z/Weathering-of-Rocks.html ACEE 219 Spring 2010 HDP 4
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ime Softening Lime Softening Ca 2+ + CO 3 2- CaCO 3 (s) Mg 2+ + 2OH - Mg(OH) 2 (s) http://www.lakelandgov.net/water/images/A5A8FEF5821E478080CB8A36B334F2DC.jpg Hardness is defined as the sum of all polyvalent cations although calcium and magnesium ions are predominant. Softening is the process to remove hardness in water. Generally this process involve the addition of lime (Ca(OH) 2 or CaO) and/or soda (Na 2 CO 3 ) ACEE 219 Spring 2010 HDP 5
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haracteristics Characteristics ome heterogeneous equilibria are slowly established 1. Some heterogeneous equilibria are slowly established.
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ACEE219_Week10_new - ACEE ACEE 219 Environmental Chemistry...

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