Topic summary
Hydriodic acid
Extracted from the Wikipedia article Hydroiodic acid.
Hydroiodic acid (or hydriodic acid) is a colorless aqueous solution of hydrogen iodide. It is a strong acid, in which hydrogen iodide is ionized completely into hydronium and iodide. Concentrated aqueous solutions of hydrogen iodide are usually 48% to 57% HI by mass.