O STOICHIOMETRY Writing the net equation for a sequence of reactions Stu The ext

Question

O STOICHIOMETRY Writing the net equation for a sequence of reactions Stu The extraction of aluminum metal from the aluminum hydroxide in bauxite ore by the Hal-Héeroult process is one of the most remarkable success stories of late 19th century practcal chemisty, turning aluminum from a rare and precious metal into the cheap commodity it is today. In step, aluminum hydroxide reacts to form alumina and water: 2 Al (OH) 3(s)Al2O3(s) + 3 H 20(9) In the second step, alumina and carbon react to form aluminum and carbon dioxide: 2 Al2O3(s)+3C(s)4 Al(s)+3 CO2(g) Write the net chemical equation for the production of aluminum from aluminum hydroxide and carbon. Be sure your equation is balanced.

Explanation / Answer

The 1st reaction is 2Al(OH)3 _____>Al2O3+3H2O (1) multiplying this reaction with 2 gives 4Al(OH)3 ____>2Al2O3+6H2O (1A) given second reaction is 2Al2O3+ 3C ___> 4Al+ 3Co2 (2) addition of eq.1a and eq.2 gives 4Al(OH)3+3C____>4Al+3Co2+6H2O

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