Ca - ->CaO - ->Ca(OH)2 --> CaCO3- - >Ca Помогите плиз

Question

Ca - ->CaO - ->Ca(OH)2 --> CaCO3- - >Ca
Помогите плиз

Answer 1

2Ca+O2=2CaO

CaO+H2O=Ca(OH)2

Ca(OH)2+NaCO3=CaCO3+Na(OH)2

CaCO3+H2=Ca+H2CO3