1 NaCl + H₂SO4 → HCI + Na₂SO4 2 CUSO + KOH → Cu(OH)₂ + K₂SO 3 ZnO + HNO₂ → Zn(NO3)₂ + H₂O 4 Ca + O, → Cao 5 Al + Cl₂ → AICL 6 CuO + HCI → CuCl, + HyO 7 NiCl₂ + NaOH → Ni(OH)₂ + Na Al+S → ALS 3 8 următoarelor reactii chimice:​