The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century 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 (Al,03) and water: 2AI(OH), (1) Al,0,(s) + 3H₂O(g) In the second step, alumina (Al2O3) and carbon react to form aluminum and carbon dioxide: +3C(s) 4A1(s) + 3 CO, (g) 2AL2O3(s) + 3C(s) Suppose the yield of the first step is 91.% and the yield of the second step is 95.%. Calculate the mass of aluminum hydroxide required to make 8.0 kg of aluminum. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.

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Chapter21: Chemistry Of The Main-group Elements
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The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of
19th century 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 (Al,03) and water:
2AI(OH), (1) Al,0,(s) + 3H₂O(g)
In the second step, alumina (Al2O3) and carbon react to form aluminum and carbon dioxide:
+3C(s) 4A1(s) + 3 CO, (g)
2AL2O3(s) + 3C(s)
Suppose the yield of the first step is 91.% and the yield of the second step is 95.%. Calculate the mass of aluminum hydroxide required to make 8.0 kg of
aluminum.
Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.
Transcribed Image Text:The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century 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 (Al,03) and water: 2AI(OH), (1) Al,0,(s) + 3H₂O(g) In the second step, alumina (Al2O3) and carbon react to form aluminum and carbon dioxide: +3C(s) 4A1(s) + 3 CO, (g) 2AL2O3(s) + 3C(s) Suppose the yield of the first step is 91.% and the yield of the second step is 95.%. Calculate the mass of aluminum hydroxide required to make 8.0 kg of aluminum. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.
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