Question

Решить генетическую связь 
Na→ NaOH→ Fe(OH)3→ Fe2O3


S → SO2→ SO3→ H2SO4→ BaSO4 

Answer 1

2Na +2 H2O = 2NaOH + H2
FeCl3 + 3NaOH = Fe(OH)3 + 3NaCl
2Fe(OH)3 = Fe2O3 + 3H2O
S + O2= SO2
2SO2 + O2 = 2SO3
SO3 + H2O= H2SO4
BaCl2 + H2SO4= BaSO4 + 2HCl