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EstequiometriaQuímica Geral

Na obtenção de ferro a partir da hematita…

(Cesgranrio-RJ) Na obtenção de ferro a partir da hematita, Fe2O3(s), considere a equação não balanceada:

Fe2O3(s) + C(s) → Fe(s) + CO(g)

Utilizando-se 4,8 t de minério, com um rendimento de 80% na reação, a quantidade de ferro produzida será de:

a) 2.688 kg

b) 3.360 kg

c) 1.344 t

d) 2.688 t

e) 3.360 t

Resolução

Equação química balanceada:

Fe2O3(s) + 3 C(s) → 2 Fe(s) + 3 CO(g)

De acordo com a equação balanceada, são produzidos 2 mols de Fe para cada mol de Fe2O3 que reage. Assim, temos:

Considerando o rendimento de 80% temos:

Lembre-se que: 1 t = 1.000 kg.

Gabarito: LETRA A

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