Question

1)SO₂⇒SO₃⇒X⇒RaSO₄
2)AlCl₃⇒X⇒Al₂O₃⇒NaAlO₂

Answer 1

1 задание:

2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
Ra(OH)2 + H2SO4 = RaSO4 + 2H2O

2 задание:

AlCl3 + 3NaOH = Al(OH)3 + 3NaCl
2Al(OH)3 =(t°)= Al2O3 + 3H2O
Al2O3 + 2NaOH =(t°)= 2NaAlO2 + H2O