▁b rom ic ▁acid . ▁It ▁is ▁an ▁orange ▁cry st all ine ▁solid ▁which ▁decom poses ▁above ▁− 4 0   ° C ; ▁if ▁he ated ▁too ▁rapidly , ▁it ▁expl odes ▁around ▁ 0   ° C . ▁A ▁few ▁other ▁un stable ▁radical ▁ox ides ▁are ▁also ▁known , ▁as ▁are ▁some ▁poor ly ▁character ised ▁ox ides , ▁such ▁as ▁di b rom ine ▁pent ox ide , ▁trib rom ine ▁oct ox ide , ▁and ▁b rom ine ▁tri ox ide . ▁ ▁The ▁four ▁ox o ac ids , ▁hyp ob rom ous ▁acid ▁( HO Br ), ▁b rom ous ▁acid ▁( HO Br O ), ▁b rom ic ▁acid ▁( HO Br O 2 ), ▁and ▁per b rom ic ▁acid ▁( HO Br O 3 ), ▁are ▁better ▁studied ▁due ▁to ▁their ▁greater ▁stability , ▁though ▁they ▁are ▁only ▁so ▁in ▁a que ous ▁solution . ▁When ▁b rom ine ▁dissol ves ▁in ▁a que ous ▁solution , ▁the ▁following ▁re actions ▁occur : ▁{ | ▁| - ▁| ▁Br 2 ▁+ ▁H 2 O ▁|| ▁ ▁HO Br ▁+ ▁H + ▁+ ▁Br − ▁|| ▁K ac ▁= ▁ 7 . 2 ▁× ▁ 1 0 − 9 ▁mol 2 ▁l − 2 ▁| - ▁| ▁Br 2 ▁+ ▁ 2 ▁O H − ▁|| ▁ ▁O Br − ▁+ ▁H 2 O ▁+ ▁Br − ▁|| ▁K alk ▁= ▁ 2 ▁× ▁ 1 0 8 ▁mol − 1 ▁l ▁|