Cuso4-co(oh)2-cuo-cucl2-cu(no3)2-cus
1)CuSO₄+2NaOH→Cu(OH)₂↓+Na₂SO₄
2)Cu(OH)₂(+t°)→CuO+H₂O
3)СuO+2HCl→CuCl₂+H₂O
4)CuCl₂+2AgNO₃→2AgCl↓+Cu(NO₃)₂
5)Cu(NO₃)₂+Na₂S→CuS↓+2NaNO₃