Ответ Автор - MrsRasta 1)Na2O + H2O = 2NaOH2)2NaOH + H2SO4=Na2SOa+2H2O2Na+ + 2OH- + 2H+ +SO4 2-= 2Na+ + SO4 2- +2H2O2OH- + 2H+ = 2H2O3)NaOH+HCl=NaCl+H2ONa+ + OH- + H+ +Cl--= Na+ + Cl- +H2OOH- + H+ = H2O