Na+H2O-->x1--> H2SO4-->x2-->BaCl2-->x3

Question

Na+H2O-->x1--> H2SO4-->x2-->BaCl2-->x3

Answer 1

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