a) Fe → FeCl3 → Fe(OH)3
1. 2Fe + 3Cl2 → FeCl3
2. FeCl3 + 3KOH → Fe(OH)3 + 3KCl
b) Cu → CuCl2 → Cu(OH)2
1. Cu + Cl2 → CuCl2
2. CuCl2 + 2NaOH → Cu(OH)2 +2NaCl
c) Li → Li2O → LiOH
1. 4Li + O2 → 2Li2O
2. Li2O + H2O → 2LiOH
3. 2Li + 2H2O → 2LiOH + 2H2
d) N2 → NH3 → NH4 + OH–
1. N2 + 3H2 → 2NH3
2. NH3 + H2O → NH4++ OH–
