CuCl₂ = Cu²⁺ + 2Cl⁻
k/- Cu²⁺ + 2e = Cu⁰
a/+ 2Cl⁻ - 2e = Cl₂
Cu²⁺ + 2Cl⁻ = Cu + Cl₂
CuCl₂ = Cu + Cl₂
Al(NO₃)₃ = Al³⁺ + 3NO₃⁻
k/- 2H₂O + 2e = H₂ + 2OH⁻
a/+ 2H₂O - 4e = O₂ + 4H⁺
6H₂O = 2H₂ + O₂ + 4OH⁻ + 4H⁺
4Al(NO₃)₃ + 18H₂O = 4Al(OH)₃↓ + 6H₂ + 3O₂ + 12HNO₃