CaCO3⟶ΔCaO+CO2\mathrm{CaCO}_{3} \underset{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}CaCO3Δ⟶CaO+CO2
NaOH+HCl⟶NaCl+H2O\mathrm{NaOH}+\mathrm{HCl} \longrightarrow \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}NaOH+HCl⟶NaCl+H2O
CaF2+2AgNO3→2AgF+Ca(NO3)2\mathrm{CaF}_{2}+2 \mathrm{AgNO}_{3} \rightarrow 2 \mathrm{AgF}+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}CaF2+2AgNO3→2AgF+Ca(NO3)2
2H2 S+SO2→2H2O+3 S2 \mathrm{H}_{2} \mathrm{~S}+\mathrm{SO}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+3 \mathrm{~S}2H2 S+SO2→2H2O+3 S
