Na→Na2O→NaOH→Na2SO4→NaCL→AgCL превращения
4Na + O2 -> 2Na2O Na2O + H2O -> 2NaOH 2NaOH + H2SO4 -> Na2SO4 + 2H2O Na2SO4 + BaCl2 -> BaSO4 + 2NaCl NaCl + AgNO3 -> AgCl + NaNO3