1) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)

quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)

quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)

2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)

quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)

quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)

\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)

CÒN ĐỂ CHIỀU MK LM CHO NHA

\(a,\\ \left(1\right)Fe+Cu\left(NO_3\right)_2\rightarrow Fe\left(NO_3\right)_2+Cu\\ \left(2\right)Fe\left(NO_3\right)_2+2KOH\rightarrow Fe\left(OH\right)_2\downarrow+2KNO_3\\ \left(3\right)Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\)

\(\left(4\right)FeCl_2\) \(\rightarrow\left(đpdd\right)\)  \(Fe+Cl_2\)

\(b,\\ \left(1\right)2Fe+3Cl_2\rightarrow\left(t^o\right)2FeCl_3\\ \left(2\right)FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\downarrow\\ \left(3\right)Fe\left(NO_3\right)_3+3KOH\rightarrow Fe\left(OH\right)_3+3KNO_3\\ \left(4\right)2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)

$\rm u)S + 2HNO_3 \rightarrow H_2SO_4 + 2NO \uparrow$

$\rm v)3Ba(NO_3)_2 + Al_2(SO_4)_3 \rightarrow 3BaSO_4 \downarrow + 2Al(NO_3)_3$
$\rm w)3Ba(OH)_2 + P_2O_5 \rightarrow Ba_3(PO_4)_3 \downarrow + 3H_2O$
$\rm x)2Fe_2O_3 + 3C \xrightarrow{t^o} 4Fe + 3CO_2 \uparrow$

1)

(5x-2y)FeO+(16x-6y)HNO₃\(\rightarrow\)(5x-2y)Fe(NO₃)₃+N_xO_y+(8x-3y)H₂O

2)

(5x-2y)M+(6nx-2ny)HNO₃\(\rightarrow\)(5x-2y)M(NO₃)_n+nN_xO_y+(3nx-ny)H₂O

3)

3xFe₂O₃+(6x-4y)Al\(\rightarrow\)6Fe_xO_y+(3x-2y)Al₂O₃

4)

3Fe_mO_n+(12m-2n)HNO₃\(\rightarrow\)3mFe(NO₃)₃+(3m-2n)NO+(6m-n)H₂O

5)

(10-2x)FeS₂+(60-6x)HNO₃\(\rightarrow\)(10-2x)Fe(NO₃)₃+15N₂O_x+(10+x)H₂O+(20-4x)H₂SO₄

1. 3FeO + 10HNO3-> 3Fe(NO3)3 + NO + 5H2O

2. 3Fe3O4 + 28HNO3->3 Fe(NO3)3 + NO + 14H2O

3.3 Cu + 2KNO3 + 4H2SO4->3 CuSO4 + 2NO + K2SO4 + 4H2O

4. 3CuFeS2 +8 Fe2(SO4)3 +8 O2 +8 H2O-> 3CuSO4 + 19FeSO4 + 8H2SO4

1, 4

2, 2

3, 8

4,

5, 8

6, 10

2Fe3O4 + 10H2SO4 → 3Fe2(SO4)3 + SO2 + 10H2O

2FeCO3 + 4H2SO4 → Fe2(SO4)3 + SO2 + 2CO2 + 4H2O

1,10FeSO4+2KMnO4+8H2SO4→5Fe2(SO4)3+2MnSO4+K2SO4+8H2O

2,3Fe(OH2)+10HNO3→3Fe(NO3)3+NO+8H2O

1.8H2SO4+2KMnO4+10FeSO4→5Fe2(SO4)3+8H2O+2MnSO4+K2SO4

2.10HNO3+3Fe(OH)2→8H2O+NO+3Fe(NO3)3

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1,Ta có các pthh ở dãy chuyển hóa thứ nhất:

2Fe(OH)₃\(\rightarrow\)Fe₂O₃+3H₂O

Fe₂O₃+3H₂SO₄\(\rightarrow\)Fe₂(SO₄)₃+3H₂O(bạn viết sai nhé làm gì có Fe(SO₄)₃

Fe₂(SO₄)₃+3Ba(OH)₂\(\rightarrow\)2Fe(OH)₃+3BaSO₄

2,Ta có các pthh xảy ra ở dãy chuyển hóa thứ hai là:

SO₃+H₂O\(\rightarrow\)H₂SO₄

Fe+H₂SO₄(loãng)\(\rightarrow\)FeSO₄+H₂

FeSO₄+Ba(OH)₂\(\rightarrow\)BaSO₄+Fe(OH)₂

Fe(OH)₂\(\rightarrow\)FeO+H₂O(trong môi trường không có không khí)

CO+FeO\(\rightarrow\)Fe+CO₂

1)

2Fe(OH)₃\(\overset{t^0}{\rightarrow}\)Fe₂O₃+3H₂O

Fe₂O₃+3H₂SO₄\(\rightarrow\)Fe₂(SO₄)₃+3H₂O

Fe₂(SO₄)₃+6NaOH\(\rightarrow\)2Fe(OH)₃+3Na₂SO₄

2)

SO₃+H₂O\(\rightarrow\)H₂SO₄

H₂SO₄+Fe\(\rightarrow\)FeSO₄+H₂

FeSO₄+2NaOH\(\rightarrow\)Fe(OH)₂+Na₂SO₄

Fe(OH)₂\(\overset{t^0}{\rightarrow}\)FeO+H₂O

FeO+H₂\(\overset{t^0}{\rightarrow}\)Fe+H₂O