А
1.2Na+2H2O=2NaOH+H2
2.NaOH+HCl=NaCl+H2O
3.NaCl + AgNO3 =AgCl↓ + NaNO3
4.2Na+S=Na2S
Б
1.2Ca+O2=2CaO
2.CaO+H2O=Ca(OH)2
3.Ca(OH)2+CO2=CaCO3+H2O
4.CaO+2HCl=CaCl2+H2O
В
1.4Al+3O2=2Al2O3
2.Al2O3+6HCl=2AlCl3+3H2O
3.AlCl3+3NaOH=Al(OH)3+3NaCl
4.Al(OH)3+KOH=K[Al(OH)4)]
5.2Al2O3=4Al+3O2
6.2Al + 2KOH + 6H2O = 2K[Al(OH)4] + 3H2
Г
1.FeCl2+2NaOH=Fe(OH)2+2NaCl
2.Fe+2HCl=FeCl2+H2
3.2Fe+Cl2=2FeCl3
4.FeCl3+3KOH=Fe(OH)3+3KCl
5.FeCl2 + K3[Fe(CN)6] → KFe[Fe(CN)6] + 2KCl
6.FeCl3 + K4[Fe(CN)6] → KFe[Fe(CN)6] + 3KCl