24 Solubiltiy and pH

24 Solubiltiy and pH - Major Determinants of Water Quality...

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Unformatted text preview: Major Determinants of Water Quality Major Determinants of Water Quality and the Impact or Availability of Water Pollutants Organisms Solubility Oxygen pH Solubility The ease with which substances dissolve in water Salts dissolve to produce ions in solution Ions Ions are stable forms of elements that acquire an electrical charge by gaining or losing electrons Sodium ion (Na + ) 11 protons (+), 10 electrons (-) By losing an electron, sodium has more protons than electrons and becomes positively charged. Chloride ion (Cl-) 17 protons (+), 18 electrons (-) By gaining an electron, chlorine has more electrons than protons and becomes negatively charged. NaCl Solid Cl-Na + Na Cl Cl Cl Cl Dissolution and Solubility Ionic Contaminants Natural and anthropogenic sources Weathering of Rock Industrial Processes Agriculture Solubility depends on the ion to which it is bonded Pb 2+ Hg 2+ AsO 4-PO 4-3 NH 4 + NO 3-Cd 2+ Forms and Solubility HgCl 2 soluble PbCO 3 poorly soluble FePO 4 poorly soluble AlPO 4 poorly soluble KH 2 PO 4 soluble CdCO 3 poorly soluble CdCl 2 soluble The degree to which contaminants impact water quality is often determined by their solubility Pb 2+ Hg 2+ AsO 4-PO 4-3 NH 4 + NO 3-Cd 2+ Toxic organic pollutants including pesticides, and industrial products generally are not ionic and are not particularly soluble in water....
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This note was uploaded on 02/24/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

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24 Solubiltiy and pH - Major Determinants of Water Quality...

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