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ACEE219_Week11_new - ACEE 219 ACEE 219 Environmental...

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Unformatted text preview: ACEE 219 ACEE 219 Environmental Chemistry Environmental Chemistry Week 11 May 11, 2010 novation Hall 127 ACEE 219 Spring 2010 HDP 1 Innovation Hall 127 eview of the Last Class eview of the Last Class Review of the Last Class Review of the Last Class 1. Precipitation-dissolution reaction olubility product (K- Solubility product (K so )- Temperature effect- Common ion effect- pH effect- Complexation effect- Competitive effect ACEE 219 Spring 2010 HDP 2 aCO aCO olubility olubility CaCO CaCO 3 Solubility Solubility CO- + HCO 3 Ca 2+, CO 3 2- H 2 CO 3 * + OH- CaCO 3 (s) H , OH Determine pH of the solution when CaCO 3 (s) is equilibrated with distilled water closed to the atmosphere. ACEE 219 Spring 2010 HDP 3 aCO aCO olubility olubility CaCO CaCO 3 Solubility Solubility 1. Equilibrium relationships ] ][ [ 10 14 − + − = = OH H K w 2 ] [ Ca S = + 2. Mass balances ] [ ] ][ [ 10 * 3 2 3 3 . 6 1 , − + − = = CO H HCO H K a 3 , 2 3 3 * 3 2 ] [ ] [ ] [ CO T C S CO HCO CO H S = + + = − −...
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