1) 2CaO + 4HCl = 2CaCl₂ + 2H₂O2) 3KOH + HNO₃ = KNO₃ + 2H₂O3) Zn + 2HCl = ZnCl₂ + H₂4) MgCO₃ = MgO + CO₂
1) 2CaO + 4HCl = 2CaCl₂ + 2H₂O
2) 3KOH + HNO₃ = KNO₃ + 2H₂O
3) Zn + 2HCl = ZnCl₂ + H₂
4) MgCO₃ = MgO + CO₂