The copper cycle experiment 1. I want to know the equation in every step of the experiment and the type of reactions occurred?

The copper cycle experiment

1. I want to know the equation in every step of the experiment and the type of reactions occurred? I just want to make sure of what I wrote.

2. How can I show all the observations and the changes that occurred in the experiment?

3. I want to know how did the last step of the procedure complete the cycle? Why the experiment of the copper cycle referred to as a cycle?

4. How the yield for copper could be greater than 100 percent? and what kind of the errors that affected the yield or the results?