What is Bismuth(III) iodide?
'''Bismuth(III) iodide''', also known as '''bismuth triiodide''', is a [[chemical compound]]. Its chemical formula is BiI<sub>3</sub>. It has [[bismuth]] and [[iodide]] [[ion]]s in it. The bismuth is in its +3 [[oxidation state]]. ==Properties== Bismuth(III) iodide is a dark gray solid. It is sometimes pale yellow, though. It does not dissolve in water. It reacts with other iodides to make iodobismuth(III) ions, BiI<sub>5</sub><sup>2-</sup>. ==Preparation== It is made by reacting bismuth powder with [[iodine]]. It is also made by reacting [[bismuth(III) oxide]] with [[hydroiodic acid]]. It can also be made by reacting [[bismuth(III) chloride]] with any iodide such as [[potassium iodide]]. ==Uses== It was used in a test for bismuth ions. Bismuth ions form a dark gray precipitate when reacted with potassium iodide because bismuth(III) iodide was made. ==Related pages== *[[Bismuth(III) bromide]] *[[Bismuth(V) fluoride]] *[[Sodium bismuthate]] *[[Zinc iodide]] [[Category:Bismuth compounds]] [[Category:Iodine compounds]]