1)4Na+O2=2Na2O
Na(0)-1e=Na(+1)|2
O(0)+2e=O(-)|1
2)2Na+2H2O=2NaOH+H2
2H(+)+2e=H2(0)|1
3)Na2O+2HCl=2NaCl+H2O
4)2NaOH+SO3=Na2SO4+H2O
1)4Na+O2=2Na2O
Na(0)-1e=Na(+1)|2
O(0)+2e=O(-)|1
2)2Na+2H2O=2NaOH+H2
Na(0)-1e=Na(+1)|2
2H(+)+2e=H2(0)|1
3)Na2O+2HCl=2NaCl+H2O
4)2NaOH+SO3=Na2SO4+H2O