Verified answer

б)  

Ca + 2H₂O = Ca(OH)₂↓ + H₂↑;

Ca(OH)₂ + CO₂ = CaCO₃↓ + H₂O;

CaCO₃ = CaO + CO₂↑;

CaO + 2HCl = CaCl₂ + H₂O;

CaCl₂ + Na₂CO₃ = CaCO₃↓ + 2NaCl.

в)

4Al + 3O₂ = 2Al₂O₃;

Al₂O₃ + 6HCl = 2AlCl₃ + 3H₂O;

AlCl₃ + 3NaOH = Al(OH)₃↓ + 3NaCl;

2Al(OH)₃ + 6Na = 2Na₃AlO₃ + 3H₂↑.

Ca+2H2O-->Ca(OH)2+H2↑

Ca(OH)2+H2CO3--->CaCO3↓+2H2O

CaCO3+HCL-->CaCL2+H2O+CO2↑

CaCL2+H2CO3-->CaCO3↓+2HCL

4Al+3O2-->2Al2O3

Al2O3+6HCL-->2AlCL3+3H2O

AlCL3+3NaOH-->Al(OH)3+3NaCL

2Al(OH)3+6Na-->2Na3AlO3+3H2