Question

химическая цепочка: Cu→CuO→CuCl2→Cu(OH)2

Answer 1

Cu-CuO-CuSO4-CuCl2-Cu(OH)2-CuO-Cu
2Сu + O2 = 2CuO
CuO + SO3 = CuSO4
CuSO4 + BaCl2 = CuCl2 + BaSO4 (осадок)
СuCl2 + 2NaOH = 2NaCl + Cu(OH)2(осадок)
Cu(OH)2 = CuO + H2OCuO + H2 = Cu + H2O