Question

Cu→CuO→Cu(NO3)2→Cu(OH)2→Cu Cl2→CuSO4

Answer 1

1.2Cu+O2=2CuO
2.CuO+2HNO3=Cu(NO3)2+H2O
3.Cu(NO3)2+2NaOH=Cu(OH)2+2NaNO3
4.Cu(OH)2+2HCl=CuCl2+2H2O
5CuCl2+H2SO4=CuSO4+2H2O