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

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

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

a) \(K_2O+H_2O->2KOH\)

b) \(2Fe+3Cl_2->2FeCl_3\)

c) \(2Al\left(OH\right)_3+3H_2SO_4->Al_2\left(SO_4\right)_3+6H_2O\)

d) \(4FeS_2+11O_2->2Fe_2O_3+8SO_2\)

e)\(2Al+6HCl->2AlCl_3+3H_2\)

f) \(2KClO_3->KCl+3O_2\)

g) \(4P+5O_2->2P_2O_5\)

h) \(3Fe+2O_2->Fe_3O_4\)

i) \(2Al+3CuSO_4->Al_2\left(SO_4\right)_3+3Cu\)

j) \(2K+2H_2O->2KOH+H_2\)

Bài 3 :

4FeS + 7O2 --t--> 2Fe2O3 + 4SO2

Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O

Fe(NO3)3 + 3 NaOH -> Fe(OH)3 +3NaNO3

2Fe(OH)3 --t--> Fe2O3 + 3H2O

Fe2O3 + 3H2 -t-> 2Fe + 3H2O

Fe + S -t-> FeS

1, FeCl₃ + 3KOH → Fe(OH)₃ + 3KCl

2Fe(OH)₃ \(\underrightarrow{t^o}\)Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂ \(\underrightarrow{t^o}\) 2Fe + 3H₂O

3Fe + 2O₂ \(\underrightarrow{t^o}\) Fe₃O₄

2, 2Ca + O₂ \(\underrightarrow{t^o}\) 2CaO

CaO + H₂O → Ca(OH)₂

Ca(OH)₂ + CO₂ → CaCO₃ + H₂O

CaCO₃ + H₂O + CO₂→ Ca(HCO₃)₂

Ca(HCO₃)₂ + 2HCl → CaCl₂ + 2H₂O + 2CO₂

CaCl₂ + Ca(OH)₂ → 2CaO + 2HCl

3, 4FeS + 7O₂ \(\underrightarrow{t^o}\) 2Fe₂O₃ + 4SO₂

Fe₂O₃ + 6HNO₃ → 2Fe(NO₃)₃ + 3H₂O

Fe(NO₃)₃ + 3KOH → Fe(OH)₃ + 3KNO₃

2Fe(OH)₃ \(\underrightarrow{t^o}\) Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂ \(\underrightarrow{t^o}\) 2Fe + 3H₂O

Fe + S \(\underrightarrow{t^o}\) FeS

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\2 Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\rightarrow2Fe+3CO_2\\3 Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(Ca+\frac{1}{2}O_2\underrightarrow{t^o}CaO\\ CaO+H_2O\rightarrow Ca\left(OH\right)_2\\ Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ CaCO_3+H_2O+CO_2\rightarrow Ca\left(HCO_3\right)_2\\ Ca\left(HCO_3\right)+2HCl\rightarrow CaCl_2+2H_2O+2CO_2\\ CaCl_2+Ca\left(OH\right)_2\rightarrow2CaO+2HCl\)

\(4FeS+7O_2\underrightarrow{t^o}2Fe_2O_3+4SO_2\\ Fe_2O_3+HNO_3\rightarrow Fe\left(NO_3\right)_3+H_2O\\ Fe\left(NO_3\right)_3+3NaOH\rightarrow3NaNO_3+Fe\left(OH\right)_3\\ 2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\\ Fe+S\underrightarrow{t^o}FeS\)

`Fe + 2HCl -> FeCl_2 + H_2`

`2Na + 2HCl -> 2NaCl + H_2`

`2Al + 6HCl -> 2AlCl_3 + 3H_2`

`2Al(OH)_3 + 3H_2SO_4 -> Al_2(SO_4)_3 + 6H_2O`

Fe + 2HCl → FeCl₂ + H₂
2Na + 2HCl → 2NaCl + H₂
2Al + 6HCl → 2AlCl₃ + 3H₂
2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 6H₂O

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(2Na+2HCl\rightarrow2NaCl+H_2\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(2Al\left(OH\right)_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+6H_2O\)

1,

2,

3,Cu+2H2SO4→2H2O+SO2+CuSO4

4,Fe+4HNO3→2H2O+NO+Fe(NO3)3

5,

6,4 Zn0 + 5 H2SO4 → 4 ZnSO4 + H2S + 4 H2O

7,4Mg + 10HNO3->4Mg(NO3)2 + NH4NO3 + 3H2O

8,2 KMnO4 + K2SO3 + 2 KOH → 2 K2MO2O4 + K2SO4 + H2O

9,2 KMnO4 + 10 FeSO4 + 8 H2SO4 → 2 Mn(SO4) + 5 Fe2(SO4)3 +K2SO4 + 8 H2O

11 câu?

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\(Fe\left(OH\right)_2\underrightarrow{t^o}FeO+H_2O\)

\(FeO+2HCl\rightarrow FeCl_2+H_2O\)

\(FeCl_2+2KOH\rightarrow Fe\left(OH\right)_2\downarrow+2KCl\)

\(Fe\left(OH\right)_2+CuSO_4\rightarrow FeSO_4+Cu\left(OH\right)_2\downarrow\)

\(FeSO_4+BaCl_2\rightarrow FeCl_2+BaSO_4\downarrow\)

\(2FeCl_2+Cl_2\rightarrow2FeCl_3\)

\(FeCl_3+3KOH\rightarrow3KCl+Fe\left(OH\right)_3\downarrow\)

\(Fe\left(OH\right)_3+3HNO_3\rightarrow Fe\left(NO_3\right)_3+3H_2O\)

\(2Fe\left(NO_3\right)_3+3Mg\rightarrow3Mg\left(NO_3\right)_2+2Fe\)

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

(1): 2H₂O =(điện phân)=> 2H₂ + O₂

(2): 3H₂ + Fe₂O₃ =(nhiệt)=> 2Fe + 3H₂O

(3): Fe + 2HCl ===> FeCl₂ + H₂\(\uparrow\)

(4): 2FeCl₂ + Cl₂ =(nhiệt)=> 2FeCl₃

(5): FeCl₃ + 3NaOH ===> Fe(OH)₃\(\downarrow\) + 3NaCl

(1): H2O \(\underrightarrow{đp}\) H2 + O2

(2):H2 + FeO\(\underrightarrow{t0}\) Fe+ H2O

(3):Fe+ 2HCl= FeCl2 + H2

(4)2FeCl2 + Cl2= 2FeCl3

(5)FeCl3 + 3NaOH = Fe(OH)3 + 3NaCl

3Fe + 2O₂ ➝ Fe₃O₄

Fe₃O₄ + 8HCl ➝ FeCl₂ + 2FeCl₃ + 4H₂O

2FeCl₂ + Cl₂ ➝ 2FeCl₃

FeCl₃ + 3AgNO₃ ➝ Fe(NO₃)₃ + 3AgCl↓

Fe(NO₃)₃ + 3NaOH ➝Fe(OH)₃ + 3NaNO₃

2Fe(OH)₃ \(\underrightarrow{t^o}\) Fe₂O₃ + 3H₂O