а)Ca + O2 = CaOCaO + H2O = CaOHOHOH2CaOHOHOH2 + 2HCl = CaCl2 + 2H2O
б)CuO + 2HCl = CuCl2 + H2OCuCl2 + 2NaOH = CuOHOHOH2 + 2NaClCuOHOHOH2 + H2SO4 = CuSO4 + 2H2O
а)
Ca + O2 = CaO
CaO + H2O = CaOHOHOH2
CaOHOHOH2 + 2HCl = CaCl2 + 2H2O
б)
CuO + 2HCl = CuCl2 + H2O
CuCl2 + 2NaOH = CuOHOHOH2 + 2NaCl
CuOHOHOH2 + H2SO4 = CuSO4 + 2H2O