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Variations in the Composition of Bromine Water During Oxidation Reactions
Author(s) -
Ziderman I.
Publication year - 1973
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197300003
Subject(s) - bromine , chemistry , aqueous solution , mole fraction , composition (language) , inorganic chemistry , fraction (chemistry) , organic chemistry , philosophy , linguistics
A cubic equation has been derived that permits calculation of the composition of aqueous bromine solutions in terms of HOBr, BrO − , Br 2 , Br − 3 and Br − as a continuous function of the pH, the initial oxidant concentration and the mole fraction of oxidant consumed. The calculations were performed by computer for the pH range 0–14 at bromine concentrations ( c 0 ) of 10 −1 to 10 −7 M. Throughout the course of an oxidation at pH 0 and c 0 = 10 −4 , bromine water is pure Br 2 . No Br − 3 exists at c 0 < 10 −3 . In the pH range 4–6, dilute bromine solutions are pure HOBr (+ equimolar Br − ). For pH > 10, bromine water is pure BrO − , while at pH < 7, no BrO − is present. These conditions are unchanged during oxidant consumption.