"' Potassium bromide "'( salt, widely used as an anticonvulsant and a sedative in the late 19th and early 20th centuries, with over-the-counter use extending to 1975 in the US . Its action is due to the bromide ion ( sodium bromide is equally effective ).
42.
Potassium bromate is readily separated from the potassium bromide present in both methods owing to its much lower solubility; when a solution containing potassium bromate and bromide is cooled to 0�C, nearly all bromate will precipitate, while nearly all of the bromide will stay in solution.
43.
It is produced on a large scale by direct reaction of bromine with excess fluorine at temperatures higher than 150 �C, and on a small scale by the fluorination of potassium bromide at 25 �C . It is a very vigorous fluorinating agent, although chlorine trifluoride is still more violent.
44.
Typical dipole moments for simple diatomic molecules are in the range of 0 to 11 D . Symmetric homoatomic species, e . g . chlorine, Cl 2, have zero dipole moment and highly ionic molecular species have a very large dipole moment, e . g . gas phase potassium bromide, KBr, with a dipole moment of 10.5 D.
45.
For diatomic molecules there is only one ( single or multiple ) bond so the bond dipole moment is the molecular dipole moment, with typical values in the range of 0 to 11 D . At one extreme, a symmetrical molecule such as chlorine,, has zero dipole moment, while near the other extreme, gas phase potassium bromide, KBr, which is highly ionic, has a dipole moment of 10.5 D.
