Question

осуществить цепочку превращений cu→cuo→cucl2→Cu(OH)2→CuO

Answer 1

2Cu+O2=2CuO
CuO+2HCl=CuCl2+H2O
CuCl2+2NaOH=Cu(OH)2+2NaCl
Cu(OH)2=CuO+H2O

Answer 2

2Cu + O2 = 2CuO
CuO + 2HCl = CuCl2 + H2O
CuCl2 + Ca(OH)2 = Cu(OH)2↓ + CaCl2
Cu(OH)2 = CuO + H2O