Chemical Reactions: Precipitation Lecture 11
Precipitation everywhere.
Precipitation in oceans:
Precipitation in rivers
Precipitation in laboratories
In precipitation reactions, two soluble ionic compounds react to form an insoluble product, a precipitate.
Precipitates form because the electrostatic attraction between the ions outweighs the tendency of the ions to remain solva...
The reaction of Pb(NO 3 ) 2  and NaI Copyright ©The McGraw-Hill Companies, Inc.  Permission required for reproduction or d...
The reaction between  Pb(NO 3 ) 2  and NaI
A precipitation reaction is the formation of an insoluble product through the net removal of solvated ions from solution.
The reaction of PbCl 2  and Na 2 SO 4 Copyright ©The McGraw-Hill Companies, Inc.  Permission required for reproduction or ...
How the precipitate was formed: <ul><li>Molecular:  PbCl 2 (aq)   + Na 2 SO 4 (aq)    PbSO 4(s)  + 2NaCl (aq) </li></ul>...
 
Solubility chart
A sample problem on predicting whether a precipitation reaction occurs.
BaSO 4  precipitated
How BaSO 4  could be formed: <ul><li>Molecular:  BaCl 2 (aq)   + FeSO 4 (aq)    BaSO 4(s)  + FeCl 2(aq) </li></ul><ul><l...
Precipitation reactions are double-displacement reactions, also called double-replacement and metathesis reactions. The io...
Precipitation theme is popular ;-)
THE END
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Lecture11221

  1. 1. Chemical Reactions: Precipitation Lecture 11
  2. 2. Precipitation everywhere.
  3. 3. Precipitation in oceans:
  4. 4. Precipitation in rivers
  5. 5. Precipitation in laboratories
  6. 6. In precipitation reactions, two soluble ionic compounds react to form an insoluble product, a precipitate.
  7. 7. Precipitates form because the electrostatic attraction between the ions outweighs the tendency of the ions to remain solvated and move randomly throughout the solution.
  8. 8. The reaction of Pb(NO 3 ) 2 and NaI Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
  9. 9. The reaction between Pb(NO 3 ) 2 and NaI
  10. 10. A precipitation reaction is the formation of an insoluble product through the net removal of solvated ions from solution.
  11. 11. The reaction of PbCl 2 and Na 2 SO 4 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
  12. 12. How the precipitate was formed: <ul><li>Molecular: PbCl 2 (aq) + Na 2 SO 4 (aq)  PbSO 4(s) + 2NaCl (aq) </li></ul><ul><li>Total ionic: Pb 2+ (aq) + 2Cl - (aq) + 2Na + (aq) + SO 2- 4 (aq)  PbSO 4(s) + 2Na + (aq) + 2Cl - (aq) </li></ul><ul><li>Net ionic: Pb 2+ (aq) + SO 2- 4 (aq)  PbSO 4(s) </li></ul>
  13. 14. Solubility chart
  14. 15. A sample problem on predicting whether a precipitation reaction occurs.
  15. 16. BaSO 4 precipitated
  16. 17. How BaSO 4 could be formed: <ul><li>Molecular: BaCl 2 (aq) + FeSO 4 (aq)  BaSO 4(s) + FeCl 2(aq) </li></ul><ul><li>Total ionic: Ba 2+ (aq) + 2Cl - (aq) + Fe 2+ (aq) + SO 2- 4 (aq)  BaSO 4(s) + Fe 2+ (aq) + 2Cl - (aq) </li></ul><ul><li>Net ionic: Ba 2+ (aq) + SO 2- 4 (aq)  BaSO 4(s) </li></ul>
  17. 18. Precipitation reactions are double-displacement reactions, also called double-replacement and metathesis reactions. The ions are exchanging partners.
  18. 19. Precipitation theme is popular ;-)
  19. 20. THE END

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