Równanie 1:

$Ca{\left(OH\right)}_2+C{O}_2\to CaC{O}_3\downarrow +H_{2}O$

Równanie 2:

$CaC{O}_3+C{O}_2+H_{2}O\to Ca{\left(HC{O}_3\right)}_2$

Równanie 3:

$Ca{\left(HC{O}_3\right)}_2+2HCl\to CaC{l}_2+2H_{2}O\cdot 2C{O}_2\uparrow$