Các phản ứng xảy ra:
\(Fe + {H_2}S{O_4}\xrightarrow{{}}FeS{O_4} + {H_2}\)
\(Fe{(OH)_2} + {H_2}S{O_4}\xrightarrow{{}}FeS{O_4} + 2{H_2}O\)
\(NaOH + HCl\xrightarrow{{}}NaCl + {H_2}O\)
\(2KOH + {H_2}S{O_4}\xrightarrow{{}}{K_2}S{O_4} + 2{H_2}O\)
\(2K + 2HCl\xrightarrow{{}}2KCl + {H_2}\)
\({K_2}O + 2HCl\xrightarrow{{}}2KCl + {H_2}O\)
\(Mg{(OH)_2} + {H_2}S{O_4}\xrightarrow{{}}MgS{O_4} + 2{H_2}O\)
\(Mg{(OH)_2} + 2HCl\xrightarrow{{}}MgC{l_2} + 2{H_2}O\)