Question

CuCl2-Cu-Co(NO3)2-Cu(OH)2-CuSO4

Answer 1

1)CuCl2+2KOH=Cu(OH)2↓+2KCl
2)Cu+4HNO3=Cu(NO3)2+2NO2+2H2O
3)Cu(NO3)2+2NaOH→Cu(OH)2↓+2NaNO3
4)Cu(OH)2+H2SO4→CuSO4+2H2O