\(a,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ 2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O\\ Fe_2(SO_4)_3+3Zn\to 3ZnSO_4+2Fe\\ Fe+2HCl\to FeCl_2+H_2\\ b,4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ Al_2O_3\xrightarrow[cryolit]{đpnc}4Al+3O_2\\ 2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+6NaOH\to 2Al(OH)_3\downarrow+3Na_2SO_4\\ 2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\)

\(c,C+O_2\xrightarrow{t^o}CO_2\\ CO_2+2NaOH\to Na_2CO_3+H_2O\\ Na_2CO_3+2HCl\to 2NaCl+H_2O+CO_2\uparrow\\ NaCl+AgNO_3\to AgCl\downarrow+NaNO_3\\ d,4Fe+3O_2\xrightarrow{t^o}2Fe_2O_3\\ Fe_2O_3+6HCl\to 2FeCl_3+3H_2O\\ FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ 2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O\\ Fe_2(SO_4)_3+3BaCl_2\to 3BaSO_4\downarrow+2FeCl_3\)

c) C + O₂ --t^o--> CO₂

2NaOH + CO₂ --> Na₂CO₃ + H₂O

Na₂CO₃ + 2HCl --> 2NaCl + CO₂ + H₂O

NaCl + AgNO₃ --> AgCl\(\downarrow\)  + NaNO₃

d) 4Fe + 3O₂ --t^o--> 2Fe₂O₃

Fe₂O₃ + 6HCl --> 2FeCl3  + 3H₂O

FeCl₃ + 3NaOH --> Fe(OH)₃\(\downarrow\) + 3NaCl

\(2Fe\left(OH\right)_3+3H_2SO_4->Fe_2\left(SO_4\right)_3+6H_2O\)

\(Fe_2\left(SO_4\right)_3+3BaCl_2->3BaSO_4\downarrow+2FeCl_3\)

Fe2O3 + 3H2 -to> 2Fe + 3H2O 

Fe + 3/2Cl2 -to=> FeCl3 

FeCl3 + 3NaOH => Fe(OH)3 + 3NaCl 

2Fe(OH)3 + 3H2SO4 => Fe2(SO4)3 + 3H2O 

a) Fe2O3 + 6HCl -> 2FeCl3 + 3H2O
FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl
2Fe(OH)3 + 3H2SO4 -> Fe(SO4)3 + 6H2O
b) CuO + HCl -> CuCl2 + H2O
CuCl2 + 2NaOH->Cu(OH)2 + 2NaCl
Cu(OH)2 + H2SO4 -> CuSO4 +2H2O

a) \(Fe_2O_3\underrightarrow{\left(1\right)}FeCl_3\underrightarrow{\left(2\right)}Fe\left(OH\right)_3\underrightarrow{\left(3\right)}Fe\left(SO_{\text{4}}\right)_3\)

\(\left(1\right)2Fe_2O_3+6Cl_2\rightarrow4FeCl_3+3O_2\)

\(\left(2\right)FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)

\(\left(3\right)PTHH:??\)

b) \(CuO\underrightarrow{\left(1\right)}CuCl_2\underrightarrow{\left(2\right)}Cu\left(OH\right)_2\underrightarrow{\left(3\right)}CuSO_4\)

\(\left(1\right)CuO+2HCl\rightarrow CuCl_2+H_2O\)

\(\left(2\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)

\(\left(3\right)Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\)

.

Fe \(\rightarrow\) FeCl3 \(\rightarrow\) Fe(OH)3 \(\rightarrow\) Fe2O3 \(\rightarrow\) Fe2(SO4)3

Fe+\(\frac{3}{2}\)Cl2\(\underrightarrow{^{to}}\) FeCl3

FeCl3+ 3NaOH\(\rightarrow\) Fe(OH)3+ 3NaCl

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

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

a, \(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_{3\downarrow}\)

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

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

b, (1) \(Fe+2HCl\rightarrow FeCl_2+H_2\)

 \(FeCl_2+Zn\rightarrow ZnCl_2+Fe\)

\(Fe+H_2SO_{4\left(l\right)}\rightarrow FeSO_4+H_2\)

\(FeSO_4+2NaOH\rightarrow Na_2SO_4+Fe\left(OH\right)_{2\downarrow}\)

\(Fe\left(OH\right)_2\xrightarrow[khongcokhongkhi]{t^o}FeO+H_2O\)

\(FeO+H_2\underrightarrow{t^o}Fe+H_2O\)

(2) \(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(Fe_3O_4+4H_2\underrightarrow{t^o}3Fe+4H_2O\)

\(2Fe+6H_2SO_{4\left(đ\right)}\underrightarrow{t^o}Fe_2\left(SO_4\right)_3+3SO_2+6H_2O\)

c, \(2FeS_2+\dfrac{11}{2}O_2\underrightarrow{t^o}Fe_2O_3+4SO_2\)

\(2SO_2+O_2⇌2SO_3\)

\(SO_3+H_2O\rightarrow H_2SO_4\)

\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)

\(CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)

\(Na_2SO_4+Ba\left(OH\right)_2\rightarrow2NaOH+BaSO_4\)

\(2NaOH+ZnO\rightarrow Na_2ZnO_2+H_2O\)

Bạn tham khảo nhé!

3Ba(OH)2 + 2FeCl3 → 3BaCl2 + 2Fe(OH)3,   Fe(OH)3 →Fe2O3+H2O,Fe2O3+3H2→2Fe+3H20