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Encyclopedia > Hydroiodic acid
Hydroiodic acid
Image:Hydroiodic acid.jpg
General
Systematic name Hydrogen iodide
(aqueous solution)
Molecular formula HI (aq)
Molar mass 127.91 g/mol
Appearance colorless liquid
CAS number [10034-85-2]
Properties
Density and phase 1.70 g/mL, azeotrope
(57% HI by weight)
Solubility in water Miscible
Melting point variable
Boiling point 127 °C at 1.03 bar
(azeotrope)
Acidity (pKa)  ?
Viscosity  ? cP at ?°C
Safety data
for 57% (by weight) solution
EU classification Corrosive (C)
R-Phrases R34
S-Phrases S1/2, S26, S45
NFPA 704 Image:nfpa_h3.png Image:nfpa_f0.png Image:nfpa_r0.png
Flash point non flammable
RTECS number MW3760000
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions Hydrofluoric acid
Hydrochloric acid
Hydrobromic acid
Related compounds Iodic acid
Periodic acid
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Hydroiodic acid (sometimes also spelled hydriodic acid) is a highly acidic aqueous solution of hydrogen iodide (HI) (Concentrated solution is usually 48 - 57% HI). It is highly corrosive and should be handled only with appropriate precautions. Hydroiodic acid is a commonly used chemical reagent and is one of the strong acids that ionize completely in an aqueous solution. Concentrated hydroiodic acid has a pH of less than 0. Hydroiodic acid is a extremely strong reducing agent and is easily oxidised (for instance, by oxygen in the air) to form free elemental iodine and thus must be kept away from oxidising agents. No file by this name exists; you can upload it. ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... Hydrogen iodide is a compound of hydrogen and iodine. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... Dissolving table salt in water In chemistry, a solution is a homogeneous mixture of one or more substances (the solutes) dissolved in another substance (the solvent). ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... An azeotrope is a liquid mixture of two or more components which has a unique constant boiling point. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid. ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid. ... The pitch drop experiment at the University of Queensland. ... The poise (P) is the cgs unit of viscosity, 1 P = 1 g·cm-1·s-1 The SI analog is 1 pascal second (Pa·s) = 1 kg·m-1·s-1 = 10 P. It is named after Jean Louis Marie Poiseuille. ... Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The flash point of a fuel is the lowest temperature at which it can form an ignitable mix with air. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... This page provides supplementary chemical data on hydroiodic acid. ... This page provides supplementary chemical data on hydroiodic acid. ... The refractive index of a material is the factor by which the phase velocity of electromagnetic radiation is slowed relative to vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... This page provides supplementary chemical data on hydroiodic acid. ... This page provides supplementary chemical data on hydroiodic acid. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... Mass spectrometry is an analytical technique to measure the mass-to-charge ratio (m/q) of ions. ... // An ion is an atom or group of atoms with a net electric charge. ... R-phrases , S-phrases , , , , Flash point non flammable RTECS number MW7875000 Supplementary data page Structure & properties n, εr, etc. ... The chemical substance hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride (HCl) gas. ... Hydrobromic Acid is a chemical compound, with the chemical formula HBr. ... Iodic acid, HIO3-, can be obtained as a white solid. ... Periodic acid is HIO4 or H5IO6. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... An acid (from Arabic Azait meaning oil, often represented by the generic formula AH) is typically a water-soluble, sour-tasting chemical compound. ... Drinking water This article focuses on water as we experience it every day. ... Dissolving table salt in water In chemistry, a solution is a homogeneous mixture of one or more substances (the solutes) dissolved in another substance (the solvent). ... Hydrogen iodide is a compound of hydrogen and iodine. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... General Name, Symbol, Number iodine, I, 53 Chemical series halogens Group, Period, Block 17, 5, p Appearance violet-dark gray, lustrous Atomic mass 126. ... A strong acid is an acid which is stronger than the hydronium ion. ... ... The correct title of this article is pH. The initial letter is capitalized due to technical restrictions. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... General Name, Symbol, Number iodine, I, 53 Chemical series halogens Group, Period, Block 17, 5, p Appearance violet-dark gray, lustrous Atomic mass 126. ...


External links

  • International Chemical Safety Card 1326
  • European Chemicals Bureau

  Results from FactBites:
 
Hydroiodic acid - Wikipedia, the free encyclopedia (156 words)
Hydroiodic acid (sometimes also spelled hydriodic acid) is a highly acidic aqueous solution of hydrogen iodide (HI) (Concentrated solution is usually 48 - 57% HI).
Hydroiodic acid is a commonly used chemical reagent and is one of the strong acids that ionize completely in an aqueous solution.
Hydroiodic acid is a extremely strong reducing agent and is easily oxidised (for instance, by oxygen in the air) to form free elemental iodine and thus must be kept away from oxidising agents.
Hydrochloric acid - Wikipedia, the free encyclopedia (2527 words)
It is a strong acid, the major component of gastric acid and of wide industrial use.
Hydrochloric acid is frequently used in chemical analysis and to digest samples for analysis.
Hydrochloric acid is a fundamental chemical, and as such it is used for a large number of small-scale applications, such as leather processing, household cleaning, and building construction.
  More results at FactBites »

 
 

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