Write the constituents of electrolyte for the extraction of aluminium
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First of all, aluminum oxide needs to be in molten form to extract the aluminum ions. Aluminum oxide, however, has a high melting point. Therefore, aluminum oxide is dissolved in molten cryolite. Cryolite is a form of an aluminum compound that has a lower melting point that aluminum oxide.
The steel case, used in electrolysis, is coated by graphite. Graphite is a form of carbon and acts at the negative cathode.
The positive anodes are also made of graphite but are immersed in the molten cryolite solution.
When electricity flows,
Aluminum ions, from the aluminum oxide, are formed at the negative cathode and then sink at the bottom because they are heavier than the cryolite solution. Then, this aluminum is collected in liquid form
On the other hand, the oxygen, from the aluminum oxide, forms at the positive anode and reacts with the carbon of the graphite to form carbon dioxide CO2.
The steel case, used in electrolysis, is coated by graphite. Graphite is a form of carbon and acts at the negative cathode.
The positive anodes are also made of graphite but are immersed in the molten cryolite solution.
When electricity flows,
Aluminum ions, from the aluminum oxide, are formed at the negative cathode and then sink at the bottom because they are heavier than the cryolite solution. Then, this aluminum is collected in liquid form
On the other hand, the oxygen, from the aluminum oxide, forms at the positive anode and reacts with the carbon of the graphite to form carbon dioxide CO2.
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