1. NaCl + H2SO4к = NaHSO4 + HCl H2 + Cl2 = 2HCl H2S + Cl2 = S + 2HCl 2. CuO + 2HCl = CuCl2 + H2O Cu + Cl2 = CuCl2 Cu + 2HCl = CuCl2 + H2 CuS + Cl2 = CuCl2 + S Cu(OH)2 + 2HCl = CuCl2 + 2H2O