Объяснение:
4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
2NaOH + H2SO4 = Na2SO4 + 2H2O
Na2SO4 + BaCl2 = BaSO4 + 2NaCl
2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + 2HCl = CaCL2 + 2H2O
CaCl2 -> Ca + Cl2
Объяснение:
4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
2NaOH + H2SO4 = Na2SO4 + 2H2O
Na2SO4 + BaCl2 = BaSO4 + 2NaCl
2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + 2HCl = CaCL2 + 2H2O
CaCl2 -> Ca + Cl2