Aluminum is mined as the mineral bauxite, which consists primarily of AI_2O_3 (a

Question

Aluminum is mined as the mineral bauxite, which consists primarily of AI_2O_3 (alumina). The aluminum can be refined by heating the bauxite to drive off the oxygen: How much aluminum is produced from 4.20 Times 10^3 kg of AI_2O_3? The oxygen produced in part (a) is allowed to react with carbon to produce carbon monoxide. Write a balanced equation describing the reaction of alumina with carbon. [You need not include the states of matter in the balanced equation ] How much CO is produced from the alumina in part (a)?

Explanation / Answer

2 Al2O3 ------------> 4 Al + 3 O2

2 moles of Al2O3 produces 4 mole of Al

2 * 102 g of Al2O3 --------> 4 * 27 g of Al

4.2 * 10^3 kg of Al2O3 ---------> ((4*27) / (2 *102)) * 4.2 * 10^3 kg of Al

                                             = 2223.59 kg of Al

Al2O3 + 3C ----------> 2Al + 3CO

102 g of Al2O3 produces 3 * 28 g of CO

4.2 * 10^3 kg of Al2O3 produces ((3 * 28) / 102) * 4.2 * 10^3 kg of CO

                                                  = 3458.82 kg of CO

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