1)2Сa +O2=CaO2)CaO +H2O=Ca(OH)23)Ca(OH)2 + H2SO4 = CaSO4 +2H2O4)CaSO4 +BaCl =CaCl2 +BaSO45)CaCl2 +H2S = CaS + 2HCl
1)2Сa +O2=CaO
2)CaO +H2O=Ca(OH)2
3)Ca(OH)2 + H2SO4 = CaSO4 +2H2O
4)CaSO4 +BaCl =CaCl2 +BaSO4
5)CaCl2 +H2S = CaS + 2HCl