Cho 10 tấn quặng hemantit chứa 60 % Fe2O3.Khối lượng Fe có thể điều chế được là

2 câu trả lời

Có 1 tấn gang chứa 960 kg sắt

Coi 960 kg sắt là 960 g sắt.

nFe = 960 : 56 = 17,14 mol

PTHH: 3CO+Fe2O3tocao2Fe+3CO2

                               8,57     17,14

 mFe2O3lí thuyết = 8,57 . 160 = 1371,2 (g)

Mà hiệu suất quá trình sản xuất là 80%  mFe2O3thực tế = 1371,2 : 80% = 1714 (g)

 mquặng = 1714 : 60% = 2856,67 (g)

Vậy để sản xuất được 1 tấn gang chứa 96% sắt ta cần 2,85667 tấn quặng hemantit chứa 60% Fe2O3

Cách 2:

PTHH: 3CO+Fe2O3tocao2Fe+3CO2

  tỉ lệ                          160      2.56

  P/ư                           m         960 (kg)     

 mFe2O3lí thuyết =960.1602.56 = 1371(kg)

 

Đáp án:

 

Giải thích các bước giải:

mFe2O3=6 tấn 

Fe2O3+3CO-->2Fe+3CO2

160               -->112

 6                   --> x

=>x=(6.112)/160=4,2  tấn 

vậy để sản xuất 4,2 tấn quặng Fe thì phải cần 10 tấn quặng Hematit

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