Question

Iron(III) oxide gets mixed with elemental carbon and heated to make elemental iron and carbon dioxide.

a) If they want to convert 1.00kg of iron (III) oxide to elemental iron, how much carbon needs to be added to the mix?
b) That 1.00kg of iron (III) oxide, with an excess of carbon, produces how much elemental iron.

Answer 1

Step-by-step explanation:

Iron(III) oxide gets mixed with elemental carbon and heated to make elemental iron and carbon dioxide.

2Fe₂O₃ + 3C = 4 Fe + 3 CO₂

2 x 160 3 x 12 4 x 56

320 gram of iron ( iii ) oxide requires 36 g of carbon for reduction

1 kg of iron will require 36 / 320 g of carbon

carbon required = 36 / 320 g

= .1125 g

= .113 g rounding off to 3 significant fig .

b )

320 gram of iron ( iii ) oxide produces 224 g of iron after reduction

1 g of iron will produce 224 / 320 g of iron

iron produced = 224 / 320 g

= 0.700 g .