Cu- CuO-CuSO4-Cu(OH)2 - H20
Cu →CuO→CuSO₄→Cu(OH)₂ → H₂O 2Cu + O₂= 2CuO CuO + H₂SO₄ = CuSO₄ +H₂O CuSO₄ + 2NaOH = Cu(OH)₂ + Na₂SO₄ Cu(OH)₂ + t = CuO + H₂O