\(4Fe(OH)_2 + O_2 + 2H_2O \to 4Fe(OH)_3\\ Fe_2(SO_4)_3 + Cu \to CuSO_4 + 2FeSO_4\\ FeSO_4 + 2KOH \to Fe(OH)_2 + K_2SO_4\)

\(4Fe\left(OH\right)_2+2H_2O+O_2\rightarrow4Fe\left(OH\right)_3\)

\(Fe_2\left(SO_4\right)_3+Fe\rightarrow3FeSO_4\)

\(FeSO_4+2KOH\rightarrow K_2SO_4+Fe\left(OH\right)_2\downarrow\)

\(S+O_2\xrightarrow[]{t^o}SO_2\)

\(SO_2+H_2O+\dfrac{1}{2}O_2\rightarrow H_2SO_4\)

\(Fe+H_2SO_4\rightarrow H_2+FeSO_4\)  (*)

\(4Fe+3O_{2\left(dư\right)}\xrightarrow[]{t^ocao}2Fe_2O_3\)

\(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)  (*)

\(Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\uparrow\)

\(Fe_2\left(SO_4\right)_3+6NaOH\rightarrow3Na_2SO_4+2Fe\left(OH\right)_3\downarrow\)  (*)

Dãy 1 : 

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

\(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\)

\(Fe\left(OH\right)_2+H_2SO_4\rightarrow FeSO_4+2H_2O\)

\(FeSO_4+Zn\rightarrow ZnSO_4+Fe\)

Dãy 2 : 

\(2Fe+3Cl_2\xrightarrow[]{t^o}2FeCl_3\)

\(FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\)

\(2Fe\left(OH\right)_3\xrightarrow[]{t^o}Fe_2O_3+3H_2O\)

\(Fe_2O_3+3CO\xrightarrow[]{t^o}Fe+3CO_2\)

Dãy 3 : 

\(2Al+3Cl_2\xrightarrow[]{t^o}2AlCl_3\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(2Al\left(OH\right)_3\xrightarrow[]{t^o}Al_2O_3+3H_2O\)

\(2Al_2O_3\xrightarrow[criolit]{đpnc}4Al+3O_2\)

Tinh chế H2SO4: 
4FeS2+11O2(t*)=>2Fe2O3+8SO2 
2SO2+O2(V2O5,450*C)=>2SO3 
SO3+H2O=>H2SO4 

+FeSO4: 
4FeS2+11O2(t*)=>2Fe2O3+8SO2 
2NaCl+2H2O(đpmn)=>2NaOH+H2+Cl2 
Fe2O3+3H2=>2Fe+3H2O 
Fe+H2SO4=>FeSO4+H2 

+Fe2(SO4)3: 
4FeS2+11O2(t*)=>2Fe2O3+8SO2 
Fe2O3+3H2SO4=>Fe2(SO4)3+3H2O 

+Fe(OH)3: 
2NaCl+2H2O(đpmn)=>2NaOH+H2+Cl2 
H2+Cl2(t*)=>2HCl 
4FeS2+11O2(t*)=>2Fe2O3+8SO2 
Fe2O3+6HCl=>2FeCl3+3H2O 
FeCl3+3NaOH=>Fe(OH)3+3NaCl 

+Na2SO4: 
2NaCl+2H2O(đpmn)=>2NaOH+H2+Cl2 
2NaOH+H2SO4=>Na2SO4+2H2O 

+NaHSO4: 
2NaCl+2H2O(đpmn)=>2NaOH+H2+Cl2 
NaOH+H2SO4=>NaHSO4+H2O 

+Na2SO3: 
4FeS2+11O2(t*)=>2Fe2O3+8SO2 
2NaCl+2H2O(đpmn)=>2NaOH+H2+Cl2 
SO2+2NaOH=>Na2SO3+H2O

1.Fe+H2SO4.➜ FeSO4+H2

2.FeSO4+ NaOH➜ Fe(OH)2 + Na2SO4

3.Fe2(SO4)3+ 6NaOH➜ 2Fe(OH)3 +3Na2SO4

4.Fe(OH)2➜ FeO +H2O

5.2Fe(OH)3➜ Fe2O3 +3H2O

6.FeO+ 2HCl ➜ FeCl2 +H2O

7.Fe2O3+ 6HCl ➜2FeCl3 +3H2O

8.Fe+Cl2➜FeCl2

9.2Fe+6HCl ➜2FeCl3 +3H2

10.2FeCl3.➜2FeCl2 +Cl2

Chúc bạn học tốt

Nhớ tích cho mình nhé

Mình làm bạn tự cân bằng nhé:

1.Fe+......H2SO4...........➜ FeSO4 + H2

2.FeSO4+.........NaOH........➜ Fe(OH)2 + Na2SO4

3.Fe2(SO4)3+........NaOH...........➜ Fe(OH)3 + Na2SO4

4.Fe(OH)2 \(\underrightarrow{t^o}\) FeO + H2O

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

6.FeO+........HCl...........➜ FeCl2 + H2O

7.Fe2O3+........HCl.........➜FeCl3 +H2O

8.Fe+......HCl...........➜FeCl2 +H2

9.Fe+........Cl2.........➜FeCl3

10.FeCl3+........Fe.......➜FeCl2

a, \(2Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

\(AlCl_3+3NaOH\rightarrow3NaCl+Al\left(OH\right)_3\)

\(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

\(Al_2O_3\underrightarrow{đpnc}2Al+\dfrac{3}{2}O_2\)

\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

\(Al_2\left(SO_4\right)_3+3Mg\rightarrow3MgSO_4+2Al\)

b, \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)

\(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_3\)

\(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)

\(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

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

\(Mg+FeCl_2\rightarrow MgCl_2+Fe\)

\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)

(34): MgSO₄ + BaCl₂ → MgCl₂ + BaSO₄↓

(35) MgCl₂ + 2NaOH → Mg(OH)₂↓ + 2NaCl

(36) Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

(37) Mg(OH)₂ + H₂SO₄ → MgSO₄ + 2H₂O

(38) MgSO₄ + 2NaOH → Na₂SO₄ + Mg(OH)₂↓

(39) MgSO₄ + BaCl₂ → BaSO₄↓ + MgCl₂

(40) CuSO₄ + Ba(OH)₂ → BaSO₄↓ + Cu(OH)₂↓

(41) CuSO₄ + Fe(OH)₂ → FeSO₄ + Cu(OH)₂↓

(42) Fe₂(SO₄)₃ + 3Cu(OH)₂ → 3CuSO₄ + 2Fe(OH)₃↓

(43) 2FeSO₄ + 2H₂SO₄ → Fe₂(SO₄)₃ + 2H₂O + SO₂↑

(44) Fe₂(SO₄)₃ + Fe → 3FeSO₄

(45) 3FeSO₄ + 2Al(OH)₃ → Al₂(SO₄)₃ + 3Fe(OH)₂↓

(46) FeSO₄ + 2NaOH → Na₂SO₄ + Fe(OH)₂↓

(48) Al(OH)₃ + NaOH → NaAlO₂ + 2H₂O

(49) 2NaAlO₂ + 3H₂O + CO₂ → 2Al(OH)₃↓ + Na₂CO₃

(50) CO₂ + 3H₂O + 2NaAlO₂ → 2Al(OH)₃↓ + Na₂CO₃

(51) 4Fe(OH)₂ + O₂ + 2H₂O \(\underrightarrow{to}\) 4Fe(OH)₃

(52) 2Fe(OH)₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 6H₂O

34. MgSO4 + BaCl2 -> BaSO4 + MgCl2

35. MgCl2 + 2NaOH -> 2NaCl + Mg(OH)2