Extraction Of Aluminium Using Electrolysis

The video explains the extraction of aluminum, the most abundant metal on Earth, which is costly due to high electricity usage. Aluminum is extracted from bauxite ore through electrolysis. The process involves dissolving aluminum oxide in molten cryolite to lower its melting point. Electrolysis occurs with graphite electrodes, where aluminum forms at the cathode and oxygen at the anode, reacting with carbon to form carbon dioxide. This reaction wears away the anode, adding to the cost. The video details the reactions at the electrodes and emphasizes the high electricity demand for aluminum extraction.

What is the most abundant metal on Earth?

Why is aluminum extraction considered expensive?

What is the role of cryolite in the extraction of aluminum?

What happens to the positive anode during the extraction of aluminum?

Describe the process that occurs at the negative cathode during electrolysis.