2Al + 6HCl → 2AlCl₃ + 3H₂↑
NaOH + Al(OH)₃ → Na[Al(OH)₄]
NH₄OH → NH₃ + H₂O
CaO + H₂O → Ca(OH)₂
ZnCl₂ + 2AgNO₃ → Zn(NO₃)₂ + 2AgCl
Ca(OH)₂ + CO₂ → CaCO₃ + H₂O
(NH₄)₂S + 2HCl → 2NH₄Cl + H₂S
H₂SO₄ + FeCO₃ → FeSO₄ + CO₂↑ + H₂O
MgCO₃ → MgO + CO₂↑
2NO₂ + H₂O + 1/2O₂ → 2HNO₃