Aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (alu

Question

Aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (alumina). The aluminum can be refined by heating the bauxite to drive off the oxygen: 2 Al2O3(s) Al(s) 3 O2(g) 4 + a. How much aluminum is produced from 3950 kg of Al203? Number Start by looking at the percent composition of 2091 kg Al b. 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.] AL, o, +30 2AI+3CO 4

Explanation / Answer

Answer – Given , mass of Al2O3 = 3950 kg

Reaction – 2Al2O3(s) -----> 4 Al(s) + 3 O2(g)

First we need to calculate the moles of the Al2O3(s)

Moles of Al2O3(s) = 3.95*106 g / 101.96 g.mol-1

                              = 38741 moles

From the above balanced reaction –

2 moles of Al2O3(s) = 4 moles of Al

So, 38741 moles of Al2O3(s) = ?

= 77481.4 moles of Al

Mass of Al = 77481.4 moles *26.982 g/mol

                  = 2.091*106 g

                  = 2091 kg

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

So from the reaction

1 moles of Al2O3 = 3 moles of CO

So, 38741 moles of Al2O3 =?

= 1.16*105 moles

Mass of CO =1.16*105 moles * 28.01 g/mol

                    = 3.26*106 g

                    = 3.26*103 kg

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