Li2O + 2 HCl = 2LiCl + H2O
1. Se=+6 F=-1, K=+1 Cl=+5 O=-2, Na=+1 N=+3 O=-2
2. SO2 (4), SO3 (6)
Zn + H₂SO₄= ZnSO₄ + H₂
H₂ + Cl₂ = 2HCl
Fe + 2HCl = FeCl₂ + H₂