Friday, March 19, 2010

Intro:
  • Synthesis: Combination of molecules to create a more complex molecule.
  • Decomposition: Breaking apart of a molecule to form two or more less complex molecules.
  • Single Displacement: one element replaces another
  • Double Displacement: Negative and Positive molecules interchange
  • Combustion: Substance combines with O2 to release CO2 and H2O(burning of hydrocarbons)
Procedure:
  • Obtain three small test tubes
  • !st-Place a piece of zinc in about .5 ml of CuSO4 solution. record observations.
  • 2nd-add .5 ml of Ba(NO3)2 solution to about .5 ml of CuSO4. record observations.
  • 3rd-Place a piece of Mg ribbon, add .5 ml of HCL solution. record observations.
  • Light the Bunsen burner and record the observations of the flame.
  • Rinse out the first test tube. Add about 2ml of H2O2 solution. Lightly heat it. Record observations.
  • Add a pinch of Mno2 (catalyst) to the H2O2 solution. Lightly heat it. Record observations
Observations Chemical Equations

Test Tube 1

After a short while the zinc began to gather copper

Zn+CuSO4-->ZnSO4+Cu

Single Displacement


Zn+CuSO4-->ZnSO4+Cu

Single Displacement

Tube 2

The mixture created a milky blue substance, after a while it separated into white on the bottom and blue on top

Ba(NO3)2+CuSO4-->BaSO4+Cu(NO3)2

Double Displacement


Ba(NO3)2+CuSO4-->BaSO4+Cu(NO3)2

Double Displacement

Test Tube 3

This mixture made bubbles and got really hot and when held under the flame it made a popping noise and the flame got a little bigger.


Mg+HCl-->H+MgCl

Single Displacement


Mg+HCl-->H+MgCl

Single Displacement

Test Tube 1+ 2

At first it was just white and bubbly. When we added the MnO2 it turned black and when we held it over the flame it began to boil and the black bubble ring goes up and down each time, getting higher.


H2O2-->O2+H2

Decomposition

H2O2-->O2+H2

Decomposition


The propane (C3H8) would be a combustion reaction.












Conclusion:
Everything has a different reaction. some stronger or weaker than others. some act more violently than others like the mixture of magnesium ribbon and the HCl solution. Some just blend, some just look as if nothing has happened, but every reaction has something in common, they're all fun to watch.

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