After a few hours, the following observations were made:
- The solution turns green. My guess: $\ce{FeSO4}$ is formed.
- There are reddish-brown and black powder deposits on both the electrodes.
- The deposits fall down easily when the set-up is shaken a little.
What are the reactions that are occurring?
According to me, the copper is displaced from the $\ce{CuSO4}$ and is deposited on the iron electrode (the cathode), and $\ce{FeSO4}$ is formed as a green solution. What is getting deposited on the anode? Are there ferrous and ferric oxides/hydroxides being formed?