Answer with english

Here are the answers to your questions:

a) Name and write the formulae of the major ore for this process.
Name: Bauxite
Formula: $\boxed{\text{Al}_2\text{O}_3 \cdot n\text{H}_2\text{O}}$

b) Write the equation of the reaction taking place at the:
Anode:

$$2\text{O}^{2-}\text{(l)} + \text{C(s)} \longrightarrow \text{CO}_2\text{(g)} + 4\text{e}^-$$

Cathode:

$$\text{Al}^{3+}\text{(l)} + 3\text{e}^- \longrightarrow \text{Al(l)}$$

c) Formula of the molten alumina:

$$\boxed{\text{Al}_2\text{O}_3}$$

d) Explain the role of cryolite added to molten alumina:
Cryolite (sodium hexafluoroaluminate, $\text{Na}_3\text{AlF}_6$) is added to lower the melting point of alumina from approximately $2072\,^\circ\text{C}$ to about $950\,^\circ\text{C}$, and also to increase the electrical conductivity of the mixture.

e) It is cheaper to recycle aluminum other than to extract it. Explain:
Recycling aluminum requires significantly less energy (about 5% of the energy needed to extract new aluminum) and reduces production costs, environmental pollution, and waste disposal.

f) Explain why graphite anodes must be replaced after some time:
Graphite (carbon) anodes react with the oxygen produced at the anode during electrolysis. The oxygen reacts with carbon to form carbon dioxide, thus consuming the anodes gradually.

$$\text{C(s)} + \text{O}_2\text{(g)} \longrightarrow \text{CO}_2\text{(g)}$$

g) State one property of aluminum that makes it suitable for wrapping food:
Aluminum is lightweight, non-toxic, resistant to corrosion by many food acids and bases, and is highly malleable, allowing it to be easily shaped into thin foil without breaking.