Question

Cu-CuO-CuCl2-Cu(OH)2-CuCl2-Cu

Answer 1

1)2Cu+O₂=2CuO
2)CuO+2HCl=CuCl₂+H₂O
3)Ca(OH)₂+CuCl₂=Cu(OH)₂↓+CaCl₂
4)Cu(OH)₂+2HCl=CuCl₂+2H₂O
5)CuCl₂=Cu↓+Cl₂↑ (электролиз)