Question

Са - СаО - Са(ОН)2 - Са СО3- СаСl2-Ca

Answer 1

2Ca+O2=2CaO

CaO+H2O=Ca(OH)2

Ca(OH)2+Na2CO3=2NaOH+CaCO3↓

CaCO3+2HCl=CaCl2+H2O+CO2

CaCl2+H2=2HCl+Ca

Answer 2

2Ca + O2 = 2CaO

 

CaO + H2O = Ca(OH)2

 

Ca(OH)2 + Na2CO3 = 2NaOH + CaCO3

 

CaCO3 + 2HCl = CaCl2 + H2O + CO2

 

CaCl2 + H2 = 2HCl + Ca