The extraction of aluminum metal from the aluminum hydroxide in bauxite ore by t

Question

The extraction of aluminum metal from the aluminum hydroxide in bauxite ore by the Hall-Heroult process is one of the most remarkable success stories of late 19th century practical chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide reacts to form alumina and water: In the second step, alumina and carbon react to form aluminum and carbon dioxide: Write the net chemical equation for the production of aluminum from aluminum hydroxide and carbon. Be sure your equation is balanced.

Explanation / Answer

2 * [ 2Al(OH)3 = Al2O3 + 3 H2O ]

2 Al2O3 + 3C = 4Al + 3CO2

Adding upper two equations,

4Al(OH)3 + 3C = 4Al + 3CO2 + 6 H2O

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