salt of bromide:
:HBr + H₂O -> H₃O⁺ + Br^-

Hydrolysis of bromine

Bromine readily reacts with water, i.e. it undergoes hydrolysis:
:Br₂ + H₂O -> HOBr + HBr

This forms hypobromous acid (HOBr), and hydrobromic acid (HBr in water). The solution is called "bromine water". The hydrolysis of bromine is more favorable in the presence