1.
1Д, 2А, 3Б
2.
2HCl+Ba(OH)2-->BaCl2+2H2O
H+ + OH- --> H2O
SiO2+2NaOH-->Na2SiO3+H2O
SiO2 + 2OH- --> SiO3(2-) + H2O
ZnSO4+2LiOH-->Li2SO4+Zn(OH)2
Zn(2+) + 2OH- --> Zn(OH)2
2AgCl+Ca(OH)2-->CaCl2+Ag2O+H2O
2Ag+ + 2OH- --> Ag2O + H2O
Mg(OH)2+Na2O-->нет реакции
Ni(OH)2+H2SO4-->NiSO4+2H2O
OH- + H+ --> H2O
3.
2Ca+O2-->2CaO
CaO+H2O-->Ca(OH)2
Ca(OH)2+CO2-->CaCO3(ос.)+H2O