Fill in the table by identifying the substance released at each electrode during electrolysis using inert electrodes.
Molten calcium iodide, $\text{CaI}_2$, is electrolysed in an inert atmosphere with inert electrodes. Write ionic equations for the reactions at the electrodes.
The electrolysis of molten $\text{CaI}_2$ is a redox process. Identify the ion that is oxidised and the ion that is reduced, and explain your answer by referring to oxidation numbers.
Describe two visual observations that would be seen during this electrolysis.
An oxide of iron dissolved in an inert solvent is electrolysed for $2.00$ hours at a current of $0.800\ \text{A}$. The electrolysis products are iron and oxygen. The mass of iron produced is $1.11\ \text{g}$. Calculate the oxidation number of Fe in the oxide of iron. Show your full working.