Precipitation Reactions - AgSO 4 . 5. Most salts containing...

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Precipitate - an insoluble solid formed by a reaction in solution. Consider the following molecular equation: AgNO 3 (aq)  + NaCl (aq)    AgCl (s)  + NaNO 3 (aq) The net ionic equation of the above molecular equation is: Ag + (aq)  + Cl - (aq)    AgCl (s) In order to know which ions will combine to form precipitates, we have the solubility rules Solubility Rules 1. All salts containing  NH 4 +  and group IA cations ( Li + Na + K + Rb + Cs + , ) are  soluble . 2. All salts containing  NO 3 - C 2 H 3 O 2 - HClO 3 - , and  ClO 4 -  are  soluble . 3. All salts containing  Cl - Br - , and  I -  are  soluble , except those with  Ag + Hg 2 2+ , and  Pb 2+ 4. All salts containing  SO 4 2-  are  soluble , except  PbSO 4 BaSO 4 HgSO 4 CaSO 4 , and 
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Unformatted text preview: AgSO 4 . 5. Most salts containing O 2-, OH-, PO 4 3-, CO 3 2-, and S 2- are insoluble , except those containing NH 4 + and group IA cations. 6. Determine the net ionic equation for the following reaction: 7. Ba(NO 3 ) 2 + Na 2 SO 4 BaSO 4 + 2NaNO 3 8. Rule number 4 tells us that BaSO 4 is insoluble. So we can write the complete ionic equation as 9. Ba 2+ (aq) +2 NO 3-(aq) +2 Na + (aq) +SO 4 2-(aq) BaSO 4 (s) +2 Na + (aq) +NO 3-(aq) 10. Removing the spectator ions leaves us with the net ionic equation: 11. Ba 2+ (aq) + SO 4 2-(aq) BaSO 4 (s)...
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This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.

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