Types of Reactions

Introduction:
(Five types of reactions)

1. Combustion: "Push" required to start, often times a violent reaction, (water and hydrocarbon)
2. Synthesis: Compound formed (Two reactions = one product)
   
3. Decomposition: Cations & anions (One Reactions breaks down to create two products)
   
4. Single Displacement: Metal takes the place of another metal in a compound
5. Double Displacement: Positive and negative of two ionic compounds interchange.

Safety:

• Goggles
  
• Aprons
• Ponytails
• Close-toed shoes
• Everyone was very well behaved throughout the lab
• Made sure to follow directions to a "T"
  

Procedure:

• First, we made sure that our lab kits weren't lacking in any important materials needed for the lab (test tubes, test tube holder, Bunsen burner, striker, test tube rack)
• Next we went to the table with a test tube and got a piece of zinc in a plastic cup and 1/2 mL of CuSO₄. We placed the Zn in the CuSO₄ and recorded the reaction in our warmup journal. (Please see table below!!!)
• The next step was to get the 2nd test tube and add 1/2 mL Ba(NO₃)₂. We recorded our observations.
• With the 3rd test tube, we added a piece of Mg ribbon and poured 1/2 mL of HCl to it. We recorded the observations in the table below.
• The next step in our lab was to light a Bunsen burner (carefully, of course). The blue flame stood about 3 inches high.
• We then rinsed the first test tube thoroughly and added about 2 mL of H₂O₂. We lightly heated it and recorded the observations.
• We then added a pinch of MnO₂ (which is a catalyst) to the H₂O₂ and lightly heated that over the Bunsen burner.
  

Results:

Conclusion:
By observing the multiple reactions that took place in this lab, we were able to identify the types of reactions that took place.

For CuSO₄ + Zn, we determined it was Single displacement. Our identification of this reaction type was brought on by the fact that a precipitate was formed from the existing metal (Zn).

Balanced: Cu + ZnSO₄

For CuSO₄ + Ba(NO₃)₂, it was decided that this was a Double displacement reaction. The foaming bubbles that formed gave us ample evidence of this.

Balanced: BaSO₄ + Cu(NO₃)₂

Our HCl + Mg was also single displacement, determined by the formation of Hydrogen gas (which we found using a lit wooden splint.)

Balanced: H₂ + MgCl₂

H₂O₂ was found to be decomposition by the wooden splint again. This time the fire went out and the embers glowed slightly.

Balanced: 4H₂O + 2O₂

Finally, C₃H₈ + O₂ was a combustion reaction as evident by its strong release of light and heat.

Balanced: 3CO₂ + H₂O