Răspuns :

Răspuns:

2Cu + O₂ → 2CuO

CuO + 2HNO₃ → Cu(NO₃)₂ + H₂O

CuO + H₂SO₄ → CuSO₄ + H₂O

CuSO₄ + BaCl₂ → BaSO₄↓ + CuCl₂

CuCl₂ + 2NaOH → Cu(OH)₂↓ + 2NaCl

Cu(OH)₂ → CuO + H₂O

-Mihai