(Five types of reactions)
- Combustion: "Push" required to start, often times a violent reaction, (water and hydrocarbon)
- Synthesis: Compound formed (Two reactions = one product)
- Decomposition: Cations & anions (One Reactions breaks down to create two products)
- Single Displacement: Metal takes the place of another metal in a compound
- Double Displacement: Positive and negative of two ionic compounds interchange.
- Goggles
- Aprons
- Ponytails
- Close-toed shoes
- Everyone was very well behaved throughout the lab
- Made sure to follow directions to a "T"
- 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.
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
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
