Odpowiedź:
FeCl₃+ 3NaOH= 3NaCl + Fe(OH)₃↓
Fe³⁺ + 3Cl⁻ + 3Na⁺ + 3OH⁻ = 3Na⁺ + 3Cl⁻ + Fe(OH)₃↓
Fe³⁺ + 3OH⁻= Fe(OH)₃↓
MgCl₂ + 2NaOH = 2NaCl + Mg(OH)₂↓
Mg²⁺ + 2Cl⁻ + 2Na⁺ + 2OH⁻ = 2Na⁺ + 2Cl⁻ = Mg(OH)₂↓
Mg²⁺ + 2OH⁻= Mg(OH)₂↓
2NaOH + ZnSO₄ = Na₂SO₄ + Zn(OH)₂↓
2Na⁺ + 2OH⁻ + Zn²⁺+ SO₄²⁻ = 2Na⁺ + SO₄²⁻+ Zn(OH)2↓
Zn²⁺ + 2OH⁻= Zn(OH)₂↓
