The formula for potassium bromide is KBr. Potassium bromide is a white crystalline ionic compound, which has a three-dimensional lattice structure formed by the arrangements of K+ and Br- ions in the lattice.
Potassium bromide is a salt formed by the reaction of potassium with bromine:
2K (s) + Br2 (g) ? 2KBr (s). It can also be obtained by reacting hydrobromic acid with potassium hydroxide: KOH (aq) + HBr (aq) ? KBr (aq) + H2O (l). Potassium bromide has a molecular mass of 119.002 grams per mole and its density is 2.74 grams per centimeter cubed. It has a high melting point of 1,353 degrees Fahrenheit.