Experiment 4: Mixing redox couples.

Objective: to observe if any reaction take place when we mix different elements/ compounds that form redox couples.

Materials:
- 3 test tubes.
- CuSO­­₄ (1M).
- NiSO­­₄.
- Zinc (solid).
- Zn(No3)2
- Copper thread.
- Magnesium (solid).

Procedure:
1.- Take a test tube and pour into it some NiSO­­_4.
2.- Take another test tube and pour into it some CuSO­­₄ (1M).

3.- Take the second test tube where the CuSO­­₄ is and put into it a piece of zinc. Write down if anything happens (meaning a reaction).

 5.- Take the first test tube where the NiSO­­₄ is and put into it some magnesium. Write down if anything happens (meaning a reaction).

6.- Take the third test tube where the zinc nitrate is and put a piece of copper thread into it. Write down if anything happens (meaning a reaction).

Collecting data:
As in this experiment we are observing if any reaction takes place between a compound and an element and no reaction has taken place, we cannot make a table or a graph with the results so we make videos anyway we've written down the different equations for the reactions taking place:
1st test tube: NiSO₄(aq) + Mg(s) --> Ni(s) + MgSO₄(aq)
2nd test tube: Zn(s) + CuSO_4(aq)--> ZnSO₄(aq) + Cu(s)  
3rd test tube: Zn(NO₃)₂(aq) + Cu(s) = Cu(NO₃)₂(aq) + Zn(s)

Conclusion: