What is the concentration of hydroiodic acid in aqueous solution?
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Hydroiodic acid (or hydriodic acid) is an aqueous solution of hydrogen iodide (HI). It is a strong acid, one that is ionized completely in an aqueous solution. It is colorless. Concentrated solutions are usually 48% to 57% HI.
What is hydroiodic acid?
Hydroiodic acid. Hydroiodic acid (or hydriodic acid) is a highly acidic aqueous solution of hydrogen iodide ( HI ) (concentrated solution usually 48 - 57% HI). It is the second strongest hydrohalic acid, after hydroastatic acid. Hydroiodic acid is a commonly used chemical reagent and is one of the strong acids that ionize completely in an...
How do you make hydroiodic acid?
Hydroiodic acid is the colorless solution formed when hydrogen iodide gas dissolves in water. It is prepared by reaction of iodine with hydrogen sulfide or hydrazine, or by an electrolytic method. Typically commercial hydroiodic acid contains 40-55% HI.
How much water does it take to dissolve hydroiodic acid?
With moist air, HI gives a mist (or fumes) of hydroiodic acid. It is exceptionally soluble in water, giving hydroiodic acid. One liter of water will dissolve 425 liters of HI gas, the most concentrated solution having only four water molecules per molecule of HI.
What is the charge of hydroiodic acid?
+5… hydrogen iodide (HI), known as hydroiodic acid, is a strong acid that is used to prepare iodides by reaction with metals or their oxides, hydroxides, and carbonates. Iodine exhibits a +5 oxidation state in the moderately strong iodic acid (HIO3), which can be readily dehydrated to yield the white solid…
What is formula of hydroiodic acid?
HIHydroiodic acid / Formula
What is the chemical symbol hydroiodic acid?
HIHydrogen iodide / Formula
How do you name hydroiodic acid?
0:000:48How to write the name for HI (Hydroiodic acid) - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo we have hydroiodic. And then we write acid. And that's the name for hi hydro iotic acid this isMoreSo we have hydroiodic. And then we write acid. And that's the name for hi hydro iotic acid this is dr b and thanks for watching.
Is hydroiodic acid ionic or molecular?
hydrogen iodide (CHEBI:43451) A diatomic molecule containing covalently bonded hydrogen and iodine atoms.
Is hydroiodic acid a strong acid?
Hydroiodic acid, or as some call it, hydriodic acid, is the second strongest acid of hydrogen and a halogen after hydrostatic acid. It is represented by the formula HI. This extremely acidic solution of hydrogen iodide and water is a widely used chemical reagent.
What is the formula for hypochlorous acid?
HClOHypochlorous acid / Formula
Why is hydroiodic acid a strong acid?
0:381:55Is HI (Hydroiodic acid) a Strong or Weak Acid - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen we say it's a strong acid what we mean is that it's fully dissociated in water it's brokenMoreWhen we say it's a strong acid what we mean is that it's fully dissociated in water it's broken apart. Completely.
How do you write hydrocyanic acid formula?
HCNHydrogen cyanide / Formula
What is the anion in hydroiodic acid?
iodideMore videos on YouTubeFormulaAnionAnion nameHII- isiodideH2SS2- issulfideHNO3NO3- isnitrateHC2H3O2C2H3O2- isacetate13 more rows
What is the cation and anion of hydrochloric acid?
In hydrogen chloride, the cation is hydrogen while the anion is chloride.
Is se2 a cation or anion?
A selenide is a chemical compound containing a selenium anion with oxidation number of −2 (Se2−), much as sulfur does in a sulfide. The chemistry of the selenides and sulfides is similar. Similar to sulfide, in aqueous solution, the selenide ion, Se2−, is prevalent only in very basic conditions.
What is hydroiodic acid?
Like other hydrogen halides, hydroiodic acid add s to alkenes to give alkyl iodides. It can also be used as a reducing agent, for example in the reduction of aromatic nitro compounds to anilines.
Is hydroiodic acid a DEA substance?
Hydroiodic acid is listed as a U.S. Federal DEA List I Chemical, owing to its use as a reducing agent related to the production of methamphetamine from ephedrine or pseudoephedrine (recovered from nasal decongestant pills).
What is the chemical formula for hydroiodic acid?
The chemical formula for hydroiodic acid is HI. Hydroiodic acid is a strong acid made by dissolving hydrogen iodide in water.
What is hydroiodic acid used for?
Uses of Hydroiodic Acid – HI. Used in the manufacture of iodides and as a reducing agent and in disinfectants and pharmaceuticals. Used as one of the primary sources of iodine in organic and inorganic synthesis.
Is halide acid aqueous or gas?
However both differ in the physical state one is gas and the other is an aqueous solution. It is one of the strongest of all common halide acids due to high stability of its corresponding conjugate base.
Is hydroiodic acid harmful to the skin?
Health Hazard – HI. Hydroiodic acid is a corrosive liquid that in contact with the skin can produce burns. Acid contact with the eyes may cause severe irritation. A strong irritant to the eyes, skin and mucous membranes is the gas hydrogen iodide. Test your Knowledge on Hydroiodic acid!
Hydroiodic Acid Formula and Structure
Hydrogen iodide is polarized because of the electronegative nature of iodide. Furthermore, because of the huge size of the iodide ion, the negative charge scatters and this results in a weaker H-I bond. And, this permits the H+ to be easily dissociated and thus, HI is given as a stronger acid if we compare it with HBr, HCl and the HF.
Reactions
Similar to other hydrogen halides, hydroiodic acid adds to alkenes to produce alkyl iodides. Also, it can be used as a reducing agent, for instance, in the reduction of aromatic nitro compounds to anilines.
Cativa Process
The Cativa process is a primary end use of hydroiodic acid that serves as a co-catalyst for the acetic acid production by the carbonylation of methanol.
Illicit Uses
Hydroiodic acid can be listed as a United States Federal DEA List I Chemical, owing to its use as a reducing agent and related to the production of methamphetamine from pseudoephedrine or ephedrine (recovered from the nasal decongestant pills).
Properties
The hydrogen iodide is described as a gas having an acrid odour, which has no colour and is soluble easily when we keep it inside the water to provide hydroiodic acid. Also, basically, the “Concentrated” hydroiodic acid is 48% - 57% (HI) inside the water.
What is the reaction of hydroiodic acid?
Hydroiodic acid reacts with organic bases (amines and amides), and inorganic bases (oxides and metal hydroxides), generating heat. It also reacts with carbonates (including limestone and construction materials that contain limestone)and hydrogen carbonates, producing carbon dioxide and heat.
How is hydroiodic acid formed?
Hydroiodic acid is formed when hydrogen iodide gas is dissolved in water. Hydroiodic acid (aqueous form) and hydrogen iodide (gaseous or anhydrous form) are interconvertible. Its anhydrous form is a molecule made up of an iodine (I) atom and a hydrogen (H) atom. It is an important reagent in organic chemistry and is one of the main ways ...
What is the relative vapour density of hydroiodic acid?
Relative vapour density (air = 1) 4.4. Hydroiodic acid belongs to the group of strong non-oxidising acids (along with hydrochloric acid and hydrobromic acid). These acids provide anions that do not act as oxidisers. They have a pKa value of less than -2, or a pH of less than 2.
What is the effect of acid on water?
The dilution of acids in water (or the additional dilution of their concentrated solutions) can create enough heat to explosively bo il water, producing acid splashes.
Is hydroiodic acid flammable?
It is corrosive to metals and skin tissue. It its anhydrous form (hydrogen iodide), it is a colourless gas with a yellow/brown tinge. It is not flammable , but prolonged exposure to heat can cause its container to explode.
Can hydrogen iodide burn?
When in contact with metals, flammable hydrogen gas is produced. Container may explode when heated. Hydrogen iodide can burn, but it is not set alight easily.
What is hydrogen iodide?
Properties of hydrogen iodide. HI is a colorless gas that reacts with oxygen to give water and iodine. With moist air, HI gives a mist (or fumes) of hydroiodic acid. It is exceptionally soluble in water, giving hydroiodic acid. One liter of water will dissolve 425 liters of HI gas, the most concentrated solution having only four water molecules per ...
Why is HI preferred over other hydrogen halides?
HI is preferred over other hydrogen halides because the iodide ion is a much better nucleophile than bromide or chloride, so the reaction can take place at a reasonable rate without much heating. This reaction also occurs for secondary and tertiary alcohols, but substitution occurs via the S N 1 pathway.
Which ion has a larger negative charge?
The iodide ion radius is much larger than the other common halides, which results in the negative charge being dispersed over a large space. By contrast, a chloride ion is much smaller, meaning its negative charge is more concentrated, leading to a stronger interaction between the proton and the chloride ion.
Is hydroiodic acid pure?
Hydroiodic acid is not pure hydrogen iodide, but a mixture containing it. Commercial "concentrated" hydroiodic acid usually contains 48–57% HI by mass. The solution forms an azeotrope boiling at 127 °C with 57% HI, 43% water. The high acidity is caused by the dispersal of the ionic charge over the anion.
Can HI be distilled?
When performed in water, the HI must be distilled . HI can also be distilled from a solution of NaI or other alkali iodide in concentrated phosphoric acid (note that concentrated sulfuric acid will not work for acidifying iodides, as it will oxidize the iodide to elemental iodine). Another way HI may be prepared is by bubbling hydrogen sulfide ...
Is H I a compound or a molecule?
Chemical compound. Hydrogen iodide ( H I) 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.
