\(NaCl+H_2O\xrightarrow[cmn]{đpdd}NaOH+\dfrac{1}{2}H_2+\dfrac{1}{2}Cl_2\) (1)
\(H_2+Cl_2\underrightarrow{as}2HCl\)
\(2FeS_2+\dfrac{11}{2}O_2\underrightarrow{t^o}Fe_2O_3+4SO_2\)
\(SO_2+\dfrac{1}{2}O_2\xrightarrow[V_2O_5]{450^oC}SO_3\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
\(4Al+3C\underrightarrow{1500-1700^oC}Al_4C_3\)
Điều chế \(FeCl_3\):
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
Điều chế \(Fe_2\left(SO_4\right)_3\):
\(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
Điều chế \(Al\left(OH\right)_3\):
\(Al_4C_3+12H_2O\rightarrow4Al\left(OH\right)_3+3CH_4\)