Răspuns:
a) ZnCl₂ + 2NaOH → 2NaCl + Zn(OH)₂↓
b) Ni(NO₃)₂ + Zn → Ni↓ + Zn(NO₃)₂
c) 2Al(OH)₃ → Al₂O₃ + 3H₂O
d) 2H₂O + Ba → Ba(OH)₂ + H₂↑
e) K₂O + CO₂ → K₂CO₃
-Mihai