Iodic acid, HIO 3. It is a white water-soluble solid. Its robustness contrasts with the instability of chloric acid and bromic acid. Iodic acid features iodine in the oxidation state +5 and is one of the most stable oxo-acids of the halogens. When heated, samples dehydrate to give iodine pentoxide. On further heating, the iodine pentoxide. Chemical formula plays an important role in understanding different concepts of chemistry. Chemistry is all about learning chemical elements and compounds and how these things work together to form several chemical equations that are hard to understand.
Iodic acidHIO what is the formula for iodic acid. It is a white water-soluble solid. Its robustness contrasts with the instability of chloric acid and bromic acid. When heated, samples dehydrate to give iodine pentoxide. On further heating, the iodine pentoxide further decomposes, giving a mix of iodine, oxygen and lower oxides of iodine. Iodic acid can be produced by oxidizing iodine I 2 with strong oxidizers such as nitric acid HNO 3chlorine Cl 2chloric acid HClO 3 or hydrogen peroxide H 2 O 2 for example:.
Iodic acid is a relatively strong acid with a p K a of 0. It is strongly oxidizing in acidic solution, less so in basic solution. When iodic acid acts as oxidizer, then the product of the reaction is either iodine, or iodide ion. Under some special conditions very low pH and high concentration of chloride ions, such as in concentrated hydrochloric acidiodic acid is reduced to iodine trichloridea golden yellow compound in solution and no further reduction occurs.
In the absence of chloride ions, when there is an excess amount of reductant, then all iodate is converted to iodide ion. When there is an excess amount of iodate, then part of the iodate is converted to iodine. It may be used in preparation of ionization to form alkyl halides.
Iodic acid is used as a strong acid in analytical chemistry. It may be used to standardize solutions of both weak and strong basesusing methyl red or methyl orange as the indicator. Iodic acid can be used to synthesize sodium or potassium iodate for increasing iodine content of salt.
A number of neutral iodine oxides are also known. From Wikipedia, the free encyclopedia. Iodic acid. CAS Number. Interactive image.
PubChem CID. Chemical formula. Solubility in water. Other cations. Related halogen oxoacids. Chemical compound. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Lehrbuch der Anorganischen Chemie in German nd ed. ISBN Hydrogen compounds. Iodine compounds. Hidden categories: CS1 German-language sources de Articles without KEGG source ECHA InfoCard ID from What sorority is lilly pulitzer in Pages using collapsible list with both background and text-align in titlestyle Articles containing unverified chemical infoboxes Articles with short description Short description matches Wikidata All articles with unsourced statements Articles with unsourced statements from June Articles needing additional references from May All articles needing additional references.
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Wikimedia Commons. Other names Iodic V acid. Acidity p K a. Main hazards. Lithium iodate Potassium iodate. Chloric acid Bromic acid.
Hydroiodic acid Iodine pentoxide Periodic acid. Y verify what is Y N? Infobox references.
Periodic acid (/ ? p ??r a? ? ? d ? k / per-eye-OD-ik) is the highest oxoacid of iodine, in which the iodine exists in oxidation state +7. Like all periodates it can exist in two forms: orthoperiodic acid, with the chemical formula H 5 IO 6 and metaperiodic acid, which has the formula HIO Periodic acid was discovered by Heinrich Gustav Magnus and C. F. Ammermuller in Search results for Ag at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select more than one item to compare. Search results for acetic acid at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select more than one item to compare.
Like all periodates it can exist in two forms: orthoperiodic acid, with the chemical formula H 5 IO 6 and metaperiodic acid, which has the formula HIO 4. Periodic acid was discovered by Heinrich Gustav Magnus and C. Modern industrial scale production involves the oxidation of a solution of sodium iodate under alkaline conditions, either electrochemically on a PbO 2 anode, or by treatment with chlorine : .
Metaperiodic acid can also be prepared from various orthoperiodates by treatment with dilute nitric acid. Orthoperiodic acid has a number of acid dissociation constants. There being two forms of periodic acid, it follows that two types of periodate salts are formed. Five I—O bond distances are in the range 1. Like all periodates periodic acid can be used to cleave various 1,2-difunctional compounds. Most notably periodic acid will cleave vicinal diols into two aldehyde or ketone fragments Malaprade reaction.
This can be useful in determining the structure of carbohydrates as periodic acid can be used to open saccharide rings. This process is often used in labeling saccharides with fluorescent molecules or other tags such as biotin. Periodic acid is also used as an oxidising agent of moderate strength, as exemplified in the Babler oxidation of secondary allylic alcohols which are oxidised to enones by stoichiometric amounts of orthoperiodic acid with catalytic PCC.
A number of neutral iodine oxides are also known. From Wikipedia, the free encyclopedia. Periodic acid. CAS Number. PubChem CID. Chemical formula. EU classification DSD outdated. Other anions. Other cations. Sodium periodate Potassium periodate. Chemical compound. Inorganic chemistry 1st English ed. San Diego, Calif. ISBN Annalen der Physik und Chemie in German. Bibcode : AnP Chemistry of the elements 2nd ed. Handbook of electrochemical constants.
Butterworths Scientific Publications Ltd. Translation editor Reed F. Handbook of preparative inorganic chemistry. Volume 1 2nd ed. New York, N. ISBN X. Ionic equilibria in analytical chemistry. New York: Springer. A study of orthoperiodic acid, H 5 IO 6 , by neutron diffraction". Acta Crystallographica. Angewandte Chemie International Edition in English.
Tetrahedron Letters. Hydrogen compounds. Iodine compounds. Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. HIO 4. External MSDS. R-phrases outdated. R23 R24 R25 R34 R N verify what is Y N? Infobox references.