Question

Fe-->Fecl2--->Fe(OH)2--->FeSO4---->Fe Fe-->FeCl3--->Fe(OH)3--->Fe203--->Fe Al-->AlCl3-->Al(OH)3-->Al2O3--->Al

Answer 1

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 : 

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

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

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

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