\(2FeCl_2 + Cl_2 \rightarrow 2FeCl_3\)

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

\(2Fe(OH)_3 + 3H_2SO_4 \rightarrow Fe_2(SO_4)_3 + 6H_2O\)

\(Fe_2(SO_4)_3 + 3BaCl_2 \rightarrow 2FeCl_3 + 3BaSO_4\)

\(\left(1\right)FeCl_2+Cl_2\rightarrow FeCl_3.\)

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

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

\(\left(4\right)Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\\ 2FeCl_2+Cl_2\xrightarrow[]{t^0}2FeCl_3\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\ 2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\\ Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_2+3BaSO_4\\ 2FeCl_2+Fe\xrightarrow[]{t^0}3FeCl_2\\ FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\)

\(Fe_2O_3+3H_2\underrightarrow{t^0}2Fe+3H_2O\)

\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{t^0}FeCl_3\)

\(2FeCl_3+Fe\rightarrow3FeCl_2\)

\(FeCl_2\underrightarrow{dpdd}Fe+Cl_2\)

\(Fe_2O_3 + 3H_2 \xrightarrow{t^o} 2Fe + 3H_2O\\ 2Fe + 3Cl_2 \xrightarrow{t^o} 2FeCl_3\\ 2FeCl_3 + Fe \to 3FeCl_2\\ Mg + FeCl_2 \to Fe + MgCl_2\)

\(Fe\left(NO_3\right)_3+3KOH\rightarrow3KNO_3+Fe\left(OH\right)_3\downarrow\)

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

\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)

\(2FeCl_3+Fe\rightarrow3FeCl_2\)

\(FeCl_2+\dfrac{1}{2}Cl_2\rightarrow FeCl_3\)

\(FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\downarrow\)

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

(2) 2Fe(OH)₃ ---t^o---> Fe₂O₃ + 3H₂O

(3) Fe₂O₃ + 6HCl ---> 2FeCl₃ + 3H₂O

(4) Fe + 2FeCl₃ ---> 3FeCl₂

(5) \(FeCl_2+2AgNO_3--->2AgCl\downarrow+Fe\left(NO_3\right)_2\)

\(2Fe+3Cl_2\rightarrow\left(t^o\right)2FeCl_3\\ FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\\ 2Fe\left(OH\right)_3\rightarrow\left(t^o\right)Fe_2O_3+3H_2O\\ Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)

2Fe+3Cl₂→(t^o)2FeCl₃

FeCl₃+3KOH→Fe(OH)3+3KCl₂

Fe(OH)₃→(t^o)Fe₂O₃+3H₂O

Fe₂O₃+6HCl→2FeCl₃+3H₂O

\(a.\)

\(NaCl+H_2SO_4\underrightarrow{t^0}NaHSO_4+HCl\)

\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)

\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{t^0}FeCl_3\)

\(2FeCl_3+Fe\rightarrow3FeCl_2\)

\(FeCl_2\underrightarrow{đpdd}Fe+Cl_2\)

\(Fe+2AgNO_3\rightarrow Fe\left(NO_3\right)_2+2Ag\)

\(b.\)

\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_2+3NaCl\)

\(2Fe\left(OH\right)_2+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)

\(Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\)

\(a,4Al+3O_2\xrightarrow[t^0]{}2Al_2O_3\\ Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\\ AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\\ AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\\ 2Al\left(OH\right)_3\xrightarrow[t^0]{}Al_2O_3+3H_2O\\ 2Al_2O_3\xrightarrow[đpnc]{criolit}4Al+3O_2\\ b,3Fe+2O_2\xrightarrow[t^0]{}Fe_3O_4\\ Fe_3O_4+8HCl\rightarrow2FeCl_3+FeCl_2+4H_2O\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\ 2Fe\left(OH\right)_3\xrightarrow[t^0]{}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\xrightarrow[t^0]{}2Fe+3CO_2\)

\(c,2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\\ Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\\ FeCl_3+AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\)

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

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

\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)

\(Fe_2O_3+2H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+2H_2O\)

\(Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\downarrow\)

Fe+3/2CI2 (t*)->FeCI3

FeCI3+3NaOH->Fe(OH)3+3NaCI
2Fe(OH)3 (t*)-> Fe203+3H20

Fe2(S04)3+3BaCI2->3BaS04+2FeCI3