Reaction Types

Introduction
Types of Reactions

1. Synthesis-Two or more substances combine into one
2. Decomposition-Compound breaks down into simpler elements
3. Single Displacement-One element takes the place of another
4. Double Displacement-Positive and negative cations switch places
5. Combustion-Carbon and Hydrogen combine quickly with Oxygen

Purpose:
To help us better understand and observe chemical reaction types.


Procedure

1. Obtain 3 small test tubes.
2. In the first test tube, place a piece of zinc and about 1/2 mL of CuSO4 solution. Record observations.
3. In the second test tube add about 1/2 mL Ba(NO3)2 solution to about 1/2 mL of CuSO4 solution. Record observations.
4. In the third test tube place a piece of magnesium ribbon. Add about 1/2 mL of HCl solution. Record observations.
5. Light a bunsen burner (burning propane gas, C3H8). Record observations of the flame.
6. Rinse out the first test tube. Add about 2 mL h2o2 solution. Lightly heat it. Record observations.
7. Add a pinch of MnO2 (catalyst to the H2O2 solution Lightly heat it. Record observations.

	Gas		Precipitate
ZnCuSO4	We observed the solution started to bubble which means that a gas was given off.		We observed that given about a half an hour this solution formed a copper colored precipitate.
	Color Change		Precipitate
Ba(NO3)2	We noticed a change in color almost instantly when the compound was created.		We observed that in about five minutes there was a white powder that formed in the tube.
	Gas		Hydrogen Gas
MnHCl	We observed that there was a gas being given off when this started to bubble.		We lit a stick and held it over the tube when it bubbled and listened to the pop.
	Fire		Smell
C3H8	We turned the gas on the bunsen burner and lit it and observed that the flame was blue.		The odor we observed smelled like propane (duh) and it was gross.
	Gas		Boil
H2O2	We observed when placed over a flame came to a rapid boil very quickly and gave off a lot of steam.		This solution came to a boil in about 5 seconds or maybe even less than that.
	Gas		Color
H2O2MnO2	This solution came to a boil then it made very large sticky bubbles which came out of the tube.		When mixed together this solution turned all black and it made bubbles that didn’t break easily.

Balanced Equations

1. Zn+Cu(SO4)=Cu+Zn(SO4) (Single Displacement)
2. Ba(NO3)2+Cu(SO4)=Ba(SO4)+Cu(NO3)2 (Double Displacement)
3. Mg+2HCl=H2+MgCl2 (Single Displacement)
4. C3H8+6O2=3CO2+12H2O (Combustion)
5. 4H2O2=4H2O+2O2 (Decomposition)
   

Conclusion
In the first reaction we knew that it was a single displacement because Zinc and Copper switch places. This shows that it is single displacement because in this type of reaction one metal takes the place of another. In the second reaction it is double displacement because the cations switch places with each other or the anions switch places with each other. In the third reaction It is another single displacement because Magnesium takes the place of hydrogen. In the fourth reaction we know that it is combustion because the products are CO2 and H2O. In the last reaction we know it is decomposition because one complex compound breaks down into two more simple compounds.