a, t/d vs nước:
SO2 + H2O -> H2SO3
Fe2O3 + 3H2O -> 2Fe(OH)3
K2O + H2O -> 2KOH
BaO + H2O -> Ba(OH)2
P2O5 + 3H2O -> 2H3PO4
b, t/d vs HCl:
Fe2O3 + 6HCl -> 2FeCl3 + 3H2O
K2O + 2HCl -> 2KCl + H2O
BaO + 2HCl -> BaCl2 + H2O
c, t/d vs KOH:
SO2 + 2KOH -> K2SO3 + H2O
P2O5 + 6KOH -> 2K3PO4 +3H2O
đáp án nè. Chúc bạn học tốt!!