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Hydrogen iodide (HI) is a diatomic molecule and hydrogen halide. Aqueous solutions of HI are known as hydroiodic acid or hydriodic acid, a strong acid . Hydrogen iodide and hydroiodic acid are, however, different in that the former is a gas under standard conditions, whereas the other is an aqueous solution of the gas .
It is an aqueous solution of hydrogen iodide with the chemical formula H I. It is a strong acid, in which hydrogen iodide is ionized completely in an aqueous solution. Concentrated aqueous solutions of hydrogen iodide are usually 48% to 57% HI by mass. [2] An oxidized solution of hydriodic acid.
Formula Appearance Use or occurrence Potassium iodide: KI white crystals iodine component of iodized salt Hydrogen iodide: HI colourless gas strong mineral acid Silver iodide: AgI yellow powder that darkens in light photoactive component of silver-based photographic film Thyroxine (3,5,3′,5′-tetraiodothyronine) C 15 H 11 I 4 NO 4: pale ...
Commercially, it is usually made by reacting iodine with hydrogen sulfide or hydrazine: [4] 2 I 2 + N 2 H 4 4 HI + N 2. At room temperature, it is a colourless gas, like all of the hydrogen halides except hydrogen fluoride, since hydrogen cannot form strong hydrogen bonds to the large and only mildly electronegative iodine atom. It melts at − ...
Aluminium iodide is a chemical compound containing aluminium and iodine. Invariably, the name refers to a compound of the composition AlI 3, formed by the reaction of aluminium and iodine [4] or the action of HI on Al metal. The hexahydrate is obtained from a reaction between metallic aluminum or aluminum hydroxide with hydrogen iodide or ...
Boron triiodide is a chemical compound of boron and iodine with chemical formula BI 3. ... hydrogen and hydrogen iodide: [2] 3LiBH 4 + 8I 2 → 3LiI + 3BI 3 + 4H 2 ...
Ammonium iodide is the inorganic compound with the formula NH 4 I. A white solid. It is an ionic compound, although impure samples appear yellow. This salt consists of ammonium cation and an iodide anion. [1] It can be prepared by the action of hydroiodic acid on ammonia. It is easily soluble in water, from which it crystallizes in cubes.
Thallium(I) iodide is are chemical compounds with the formula TlI. It is exists as both a solid and high temperature red polymorph . Thallium(I) iodide is one of several water-insoluble metal iodides , along with AgI , CuI , SnI 2 , SnI 4 , PbI 2 , and HgI 2 .