Question

Cu→cuo→cucl2→cu(oн) 2→cuo→cuso4

Answer 1

1) 2Cu + O2 = 2CuO
2) CuO + 2HCl = CuCl2 + H2O
3) CuCl2 + 2NaOH = Cu(OH)2 + 2NaCl
4) при нагревании Cu(OH)2 = CuO + H2O 
5) CuO + H2SO4 = CuSO4 + H2O

Answer 2

cu+o2=cuo
cuo+hcl=cucl2+h2o
cucl2+na(oh)2=cu(oh)2+nacl
cu(oh)2+h2o=cuo+2hoh
cuo+h2so4=cuso4+h2o