Question

Напишите молекулярные уравнения реакций:

Answer 1

2Na+2H2O=2NaOH+H2
2NaOH+H2SO4=Na2SO4+2H2O
Na2SO4+ BaCl2=BaSO4+2NaCl

Answer 2

$Na - NaOH - Na_2SO_4 - BaCl_2 - X. \ \ 2Na + 2H_2O = 2NaOH + H_2; \ 2NaOH + FeSO_4 = Na_2SO_4 + Fe(OH)_2; \ Na_2SO_4 + BaCl_2 = 2NaCl + BaSO_4.$