Fill in the table by identifying the substance produced at each electrode during electrolysis with inert electrodes for: AgNO$_3$(aq), concentrated NaCl(aq), and CuSO$_4$(aq).
Molten calcium iodide, CaI$_2$, is electrolysed in an inert atmosphere using inert electrodes. Write ionic equations for the reactions at the electrodes.
Molten CaI$_2$ undergoes redox during electrolysis. Identify the ion that is oxidised and the ion that is reduced, and support your answer by referring to oxidation numbers.
Give two visual observations that would be seen during this electrolysis.
An oxide of iron dissolved in an inert solvent is electrolysed for $2.00\,\text{hours}$ with a current of $0.800\,\text{A}$. The products of electrolysis are iron and oxygen. The iron collected has a mass of $1.11\,\text{g}$. Calculate the oxidation number of Fe in the oxide of iron. Show all your working.