аCa + O2 = CaCaO + H2O = Ca(OH)Ca(OH)2 + 2HCl = CaCl2 + 2H2O
бCuO + 2HCl = CuCl2 + H2CuCl2 + 2NaOH = Cu(OH)2 + 2NaCCu(OH)2 + H2SO4 = CuSO4 + 2H2O
а
Ca + O2 = Ca
CaO + H2O = Ca(OH)
Ca(OH)2 + 2HCl = CaCl2 + 2H2O
б
CuO + 2HCl = CuCl2 + H2
CuCl2 + 2NaOH = Cu(OH)2 + 2NaC
Cu(OH)2 + H2SO4 = CuSO4 + 2H2O