А) 2NaOH + MgSO4 -> Na2SO4+Mg(OH)2 ⬇️
2Na + 2OH + Mg + SO4 -> 2Na+SO4+Mg(OH)2 ⬇️
Mg + 2OH -> Mg(OH)2 ⬇️
б) 2HCI + Ca(OH)2 -> CaCI2 + 2H2O
2H + 2CI + Ca + 2OH -> Ca + 2Cl + 2H2O
2H + 2OH -> 2H2O
в) NaCI + AgNO3 -> AgCl⬇️ + NaNO3
Na + Cl + Ag + NO3 -> AgCl⬇️ + Na + NO3
Ag + Cl -> AgCl⬇️
г) FeCl2 + 2NaOH -> 2NaCl + Fe(OH)2 ⬇️
Fe + 2Cl + 2Na + 2OH -> 2Na+2Cl+Fe(OH)2⬇️
Fe + 2OH -> Fe(OH)2 ⬇️