\(\begin{array}{l}
4Fe(OH)_2+O_2\xrightarrow{t^o}2Fe_2O_3+4H_2O\\
2CO_2+Ca(OH)_2\to Ca(HCO_3)_2\\
Al_2O_3+6HCl\to 2AlCl_3+3H_2O\\
2Fe+6H_2SO_4\xrightarrow{t^o}Fe_2(SO_4)_3+3SO_2↑+6H_2O\\
2FeO+4H_2SO_4\xrightarrow{t^o}Fe_2(SO_4)_3+SO_2↑+4H_2O\\
2Fe(OH)_2+4H_2SO_4\xrightarrow{t^o}Fe_2(SO_4)_3+SO_2↑+6H_2O\\
3Fe_3O_4+28HNO_3\to 9Fe(NO_3)_3+NO↑+14H_2O\\
Fe_3O_4+10HNO_3\to 3Fe(NO_3)_3+NO_2↑+5H_2O\\
8Fe_3O_4+74HNO_3\to 24Fe(NO_3)_3+N_2O↑+37H_2O
\end{array}\)

Các phản ứng xảy ra:

\(4F{\text{e}}{(OH)_2} + {O_2}\xrightarrow{{{t^p}}}2F{{\text{e}}_2}{O_3} + 4{H_2}O\)

\(Ca{(OH)_2} + 2C{O_2}\xrightarrow{{}}Ca{(HC{O_3})_2}\)

\(A{l_2}{O_3} + 6HCl\xrightarrow{{}}2{\text{A}}lC{l_3} + 3{H_2}O\)

\(2F{\text{e}} + 6{H_2}S{O_4}\xrightarrow{{{t^o}}}F{{\text{e}}_2}{(S{O_4})_3} + 3{\text{S}}{O_2} + 6{H_2}O\)

\(2F{\text{eO + 4}}{{\text{H}}_2}S{O_4}\xrightarrow{{{t^o}}}F{{\text{e}}_2}{(S{O_4})_3} + S{O_2} + 4{H_2}O\)

\(2F{\text{e(OH}}{{\text{)}}_2}{\text{ + 4}}{{\text{H}}_2}S{O_4}\xrightarrow{{{t^o}}}F{{\text{e}}_2}{(S{O_4})_3} + S{O_2} + 6{H_2}O\)

\(3F{{\text{e}}_3}{O_4} + 28HN{O_3}\xrightarrow{{}}9F{\text{e}}{(N{O_3})_3} + NO + 14{H_2}O\)

\(F{{\text{e}}_3}{O_4} + 10HN{O_3}\xrightarrow{{}}3F{\text{e}}{(N{O_3})_3} + NO_2 + 5{H_2}O\)

\(8F{{\text{e}}_3}{O_4} + 74HN{O_3}\xrightarrow{{}}24F{\text{e}}{(N{O_3})_3} + {N_2}O + 37{H_2}O\)