а) Pb(NO3)2 + 2NaCl → PbCl2 + 2NaNO3
Molecular equation: Lead(II) nitrate + Sodium chloride → Lead(II) chloride + Sodium nitrate
Ionic equation: Pb2+ + 2NO3- + 2Na+ + 2Cl- → PbCl2 + 2Na+ + 2NO3-
Net ionic equation: Pb2+ + 2Cl- → PbCl2

б) Na2CO3 + H2SO4 → Na2SO4 + H2O + CO2
Molecular equation: Sodium carbonate + Sulfuric acid → Sodium sulfate + Water + Carbon dioxide
Ionic equation: 2Na+ + CO3^2- + 2H+ + SO4^2- → 2Na+ + SO4^2- + H2O + CO2
Net ionic equation: CO3^2- + 2H+ → H2O + CO2

в) KOH + HNO3 → KNO3 + H2O
Molecular equation: Potassium hydroxide + Nitric acid → Potassium nitrate + Water
Ionic equation: K+ + OH- + H+ + NO3- → K+ + NO3- + H2O
Net ionic equation: OH- + H+ → H2O

г) CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4
Molecular equation: Copper(II) sulfate + Sodium hydroxide → Copper(II) hydroxide + Sodium sulfate
Ionic equation: Cu^2+ + SO4^2- + 2Na+ + 2OH- → Cu(OH)2 + 2Na+ + SO4^2-
Net ionic equation: Cu^2+ + 2OH- → Cu(OH)2

д) KCl + AgNO3 → KNO3 + AgCl
Molecular equation: Potassium chloride + Silver nitrate → Potassium nitrate + Silver chloride
Ionic equation: K+ + Cl- + Ag+ + NO3- → K+ + NO3- + AgCl
Net ionic equation: Cl- + Ag+ → AgCl