а) СuCl₂ + 2KOH = Cu(OH)₂ + 2KCl
б) 2HCl + Na₂SO₃ = 2NaCl + SO₂ + H₂O +
в) NaOH + HCl = H₂O + NaCl
г) Pb(NO₃)₂ + K₂S = PbS + 2KNO₃
д) 2HCl + Na₂CO₃ = 2NaCl + H₂O + CO₂
е) FeCl₃ + 3NaOH = Fe(OH)₃ + 3NaCl
Ca(OH)₂ + CuCl₂ = СaCl₂ + Cu(OH)₂
CaCl₂ + Na₂CO₃ = CaCO₃ + 2NaCl
CaCO₃ = CO₂ + H₂O
CuSO₄ + 2KOH = Cu(OH)₂ + K₂SO₄
Cu(OH)₂ + 2HCl = CuCl₂ + 2H₂O
CuCl₂ + K₂S = CuS + 2KCl