H2SO3 is a weak acid. Itdissociates as follows: H2SO3 (aq) HSO3- (aq) + H+ (aq) HSO3- (aq) SO32- (aq) + H+ (aq) The major species in the solution areH+, HSO3- (aq),SO32- (aq), H2SO3(aq) Solution H2SO3 is a weak acid. Itdissociates as follows: H2SO3 (aq) HSO3- (aq) + H+ (aq) HSO3- (aq) SO32- (aq) + H+ (aq) The major species in the solution areH+, HSO3- (aq),SO32- (aq), H2SO3(aq).