$CaCO_3\xrightarrow{{t^o}} CO_2+CaO$ (vôi sống)
$CaO+H_2O_{\text{vừa đủ}} \to Ca(OH)_2$ (vôi tôi)
$2NaCl+2H_2O\xrightarrow{{đpmn}} Cl_2+H_2+2NaOH$ (xút)
$2NaOH+CO_2\to H_2O+Na_2CO_3$ (soda)
$2NaCl\xrightarrow{{đpnc}} 2Na+Cl_2$
$H_2+Cl_2\xrightarrow{{t^o}} 2HCl$
$CaCO_3+2HCl\to CaCl_2+H_2O+CO_2$
$CaCl_2\xrightarrow{{đpnc}} Ca+Cl_2$
$2NaOH+Cl_2\to \underbrace{NaCl+NaClO+H_2O}_{\text{ nước Javel}}$
$Ca(OH)_2+Cl_2\xrightarrow{{30^oC}}H_2O+ CaOCl_2$ (clorua vôi)
