Lecture 10, Chemical Reactions
Announcements
Chemical Equations
- Symbolism of chemical formula
- Types of Reactions
- Combination Reactions (two elements or compounds combine)
A + B - > AB
- Decomposition Reactions (something breaks down)
AB -> A + B
- Displacement Reactions (Switch reactants)
AB + CD -> AD + BC
- Examples:
- Demonstrate Electrolysis of Water and balance equations
- H2O(l) -> H2(g) + O2(g) (Decomposition)
- H2(g) + O2(g) -> H2O(l) (Combination)
- Demonstrate mixing baking soda with vinigar makes a fizz (bring matches):
- Baking Soda + Viniger -> ?
- Sodium Bicarbonate + Acetic Acid (Hydrogen Acetate)
- NaHCO3(s) + HC2H3O2 (aq) -> Na+(aq) + H2O(aq) + CO2(g) + C2H3O2- (aq)
- Demonstrate precipitation of silver chloride
- NaCl(s) -> Na1+(aq) + Cl1-(aq)
- AgNO3 (s) -> Ag1+ (aq) + NO31-(aq)
- Ag1+ (aq) + Cl1-(aq) -> AgCl (s)
- NaCl (aq) + AgNO3 (aq) -> AgCl (s) + NaNO3 (aq)
- Fe(s) + Cl2(g) -> FeCl3(s) (Do this one on board)
This page is maintained by
Scott Van Bramer
Department of Chemistry
Widener University
Chester, PA 19013
Please send any comments, corrections, or suggestions to svanbram@science.widener.edu.
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Last Updated 11/1/02