Potassium chlorate - wikipedia Potassium chlorate Potassium chlorate Names Other names Potassium chlorate ( V ), Potcrate Identifiers CAS Number 3811 - 04 - 9 3D model ( JSmol ) Interactive image ChemSpider 18512 ECHA InfoCard 100.021. 173 EC Number 223 - 289 - 7 PubChem CID 6426889 RTECS number FO0350000 UNII H35KS68EE7 UN number 1485 InChI InChI = 1S / ClHO3. K / c2 - 1 ( 3 ) 4 ; / h ( H, 2, 3, 4 ) ; / q ; + 1 / p - 1 Key : VKJKEPKFPUWCAS - UHFFFAOYSA - M InChI = 1 / ClHO3. K / c2 - 1 ( 3 ) 4 ; / h ( H, 2, 3, 4 ) ; / q ; + 1 / p - 1 Key : VKJKEPKFPUWCAS - REWHXWOFAC SMILES ( K+ ). ( O - ) Cl ( = O ) = O Properties Chemical formula KClO Molar mass 122.55 g mol Appearance white crystals or powder Density 2.32 g / cm Melting point 356 ° C ( 673 ° F ; 629 K ) Boiling point 400 ° C ( 752 ° F ; 673 K ) decomposes Solubility in water 3.13 g / 100 mL ( 0 ° C ) 4.46 g / 100 mL ( 10 ° C ) 8.15 g / 100 mL ( 25 ° C ) 13.21 g / 100 mL ( 40 ° C ) 53.51 g / 100 mL ( 100 ° C ) 183 g / 100 g ( 190 ° C ) 2930 g / 100 g ( 330 ° C ) Solubility soluble in glycerol negligible in acetone and liquid ammonia Solubility in glycerol 1 g / 100 g ( 20 ° C ) Magnetic susceptibility ( χ ) − 42.8 10 cm / mol Refractive index ( n ) 1.40835 Structure Crystal structure monoclinic Thermochemistry Specific heat capacity ( C ) 100.25 J / mol K Std molar entropy ( S ) 142.97 J / mol K Std enthalpy of formation ( Δ H ) − 391.2 kJ / mol Gibbs free energy ( Δ G  ̊ ) - 289.9 kJ / mol Hazards Safety data sheet ICSC 0548 GHS pictograms GHS signal word Danger GHS hazard statements H271, H302, H332, H411 GHS precautionary statements P220, P273 NFPA 704 0 OX Flash point 400 ° C ( 752 ° F ; 673 K ) Lethal dose or concentration ( LD, LC ) : LD ( median dose ) 1870 mg / kg ( oral, rat ) Related compounds Other anions Potassium bromate Potassium iodate Potassium nitrate Other cations Ammonium chlorate Sodium chlorate Barium chlorate Related compounds Potassium chloride Potassium hypochlorite Potassium chlorite Potassium perchlorate Except where otherwise noted, data are given for materials in their standard state ( at 25 ° C ( 77 ° F ), 100 kPa ). Y verify ( what is ? ) Infobox references Potassium chlorate is a compound containing potassium, chlorine and oxygen atoms, with the molecular formula KClO. In its pure form, it is a white crystalline substance. It is the most common chlorate in industrial use. It is used as an oxidizing agent, to prepare oxygen, as a disinfectant, in safety matches, in explosives and fireworks, in cultivation, forcing the blossoming stage of the longan tree, causing it to produce fruit in warmer climates. Contents 1 Production 2 Uses 3 Safety 4 See also 5 References 6 External links Production On the industrial scale, potassium chlorate is produced by the Liebig process : passing chlorine into hot calcium hydroxide, subsequently adding potassium chloride : 6 Ca ( OH ) + 6 Cl → Ca ( ClO ) + 5 CaCl + 6 H O Ca ( ClO ) + 2 KCl → 2 KClO + CaCl The electrolysis of KCl in aqueous solution is also used sometimes, in which elemental chlorine formed at the anode react with KOH in situ. The low solubility of KClO in water causes the salt to conveniently isolate itself from the reaction mixture by simply precipitating out of solution. Potassium chlorate can be produced in small amounts by disproportionation in a sodium hypochlorite solution followed by metathesis reaction with potassium chloride : 3 NaOCl → 2 NaCl + NaClO KCl + NaClO → NaCl + KClO It can also be produced by passing chlorine gas into a hot solution of caustic potash : 3 Cl + 6 KOH → KClO + 5 KCl + 3 H O Uses Potassium chlorate burning sugar Potassium chlorate was one key ingredient in early firearms percussion caps ( primers ). It continues in that application, where not supplanted by potassium perchlorate. Chlorate - based propellants are more efficient than traditional gunpowder and are less susceptible to damage by water. However, they can be extremely unstable in the presence of sulfur or phosphorus and are much more expensive. Chlorate propellants must be used only in equipment designed for them ; failure to follow this precaution is a common source of accidents. Potassium chlorate, often in combination with silver fulminate, is used in trick noise - makers known as `` crackers '', `` snappers '', `` pop - its '', or `` bang - snaps '', a popular type of novelty firework. Another application of potassium chlorate is as the oxidizer in a smoke composition such as that used in smoke grenades. Since 2005, a cartridge with potassium chlorate mixed with lactose and rosin is used for generating the white smoke signalling the election of new pope by a papal conclave. Potassium chlorate is often used in high school and college laboratories to generate oxygen gas. It is a far cheaper source than a pressurized or cryogenic oxygen tank. Potassium chlorate readily decomposes if heated while in contact with a catalyst, typically manganese ( IV ) dioxide ( MnO ). Thus, it may be simply placed in a test tube and heated over a burner. If the test tube is equipped with a one - holed stopper and hose, warm oxygen can be drawn off. The reaction is as follows : 2 KClO → 3 O + 2 KCl Heating it in the absence of a catalyst converts it into potassium perchlorate : 4 KClO → 3 KClO + KCl With further heating, potassium perchlorate decomposes to potassium chloride and oxygen : KClO → KCl + 2 O The safe performance of this reaction requires very pure reagents and careful temperature control. Molten potassium chlorate is an extremely powerful oxidizer and spontaneously reacts with many common materials such as sugar. Explosions have resulted from liquid chlorates spattering into the latex or PVC tubes of oxygen generators, as well as from contact between chlorates and hydrocarbon sealing greases. Impurities in potassium chlorate itself can also cause problems. When working with a new batch of potassium chlorate, it is advisable to take a small sample ( ~ 1 gram ) and heat it strongly on an open glass plate. Contamination may cause this small quantity to explode, indicating that the chlorate should be discarded. Potassium chlorate is used in chemical oxygen generators ( also called chlorate candles or oxygen candles ), employed as oxygen - supply systems of e.g. aircraft, space stations, and submarines, and has been responsible for at least one plane crash. A fire on the space station Mir was also traced to this substance. The decomposition of potassium chlorate was also used to provide the oxygen supply for limelights. Potassium chlorate is used also as a pesticide. In Finland it was sold under trade name Fegabit. Potassium chlorate can react with sulfuric acid to form a highly reactive solution of chloric acid and potassium sulfate : 2 KClO + H SO → 2 HClO + K SO The solution so produced is sufficiently reactive that it spontaneously ignites if combustible material ( sugar, paper, etc. ) is present. In schools, molten potassium chlorate is used in the dramatic screaming jelly babies demonstration. In chemical labs it is used to oxidize HCl and release small amounts of gaseous chlorine. Insurgents in Afghanistan also use potassium chlorate extensively as a key component in the production of improvised explosive devices. When significant effort was made to reduce the availability of ammonium nitrate fertilizer in Afghanistan, IED makers started using potassium chlorate as a cheap and effective alternative. In 2013, 60 % of IEDs in Afghanistan used potassium chlorate, making it the most common ingredient used in IEDs. Safety Potassium chlorate should be handled with care. It reacts vigorously, and in some cases spontaneously ignites or explodes, when mixed with many combustible materials. It burns vigorously in combination with virtually any combustible material, even those normally only slightly flammable ( including ordinary dust and lint ). Mixtures of potassium chlorate and a fuel can ignite by contact with sulfuric acid, so it should be kept away from this reagent. Sulfur should be avoided in pyrotechnic compositions containing potassium chlorate, as these mixtures are prone to spontaneous deflagration. Most sulfur contains trace quantities of sulfur - containing acids, and these can cause spontaneous ignition - `` Flowers of sulfur '' or `` sublimed sulfur '', despite the overall high purity, contains significant amounts of sulfur acids. Also, mixtures of potassium chlorate with any compound with ignition promoting properties ( ex. antimony ( III ) sulfide ) are very dangerous to prepare, as they are extremely shock sensitive. See also Chloric acid References ^ Jump up to : `` potassium chlorate ''. Retrieved 9 July 2015. Jump up ^ Seidell, Atherton ; Linke, William F. ( 1952 ). ( Google Books Solubilities of Inorganic and Organic Compounds ) Check url = value ( help ). Van Nostrand. Retrieved 2014 - 05 - 29. ^ Jump up to : Zumdahl, Steven S. ( 2009 ). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0 - 618 - 94690 - X. ^ Jump up to : `` Potassium chlorate ''. Retrieved 9 July 2015. Jump up ^ Michael Chambers. `` ChemIDplus - 3811 - 04 - 9 - VKJKEPKFPUWCAS - UHFFFAOYSA - M - Potassium chlorate - Similar structures search, synonyms, formulas, resource links, and other chemical information ''. Retrieved 9 July 2015. Jump up ^ Manochai, P. ; Sruamsiri, P. ; Wiriya - alongkorn, W. ; Naphrom, D. ; Hegele, M. ; Bangerth, F. ( February 12, 2005 ). `` Year around off season flower induction in longan ( Dimocarpus longan, Lour. ) trees by KClO3 applications : potentials and problems ''. Scientia Horticulturae. Department of Horticulture, Maejo University, Chiang Mai, Thailand ; Department of Horticulture, Chiang Mai University, Chiang Mai, Thailand ; Institute of Special Crops and Crop Physiology, University of Hohenheim, 70593 Stuttgart, Germany. 104 ( 4 ) : 379 -- 390. Retrieved November 28, 2010. Jump up ^ Реми, Г. Курс неорганической химиию, т. 1 / Перевод с немецкого под ред. А. В. Новосёловой. Москва : Мир, 1972. - с. 770 / / ( translated from :) Heinrich Remy. Lehrbuch der anorganischen Chemie. XI Auflage. Band 1. Leipzig : Geest & Portig K. - G., 1960. Jump up ^ Anne Marie Helmenstine, Ph. D. `` Potassium Chlorate Synthesis ( Substitute ) Formula ''. About.com Education. Retrieved 9 July 2015. ^ Jump up to : Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw - Hill, 2002, ISBN 0 - 07 - 049439 - 8 Jump up ^ Daniel J. Wakin and Alan Cowell ( March 13, 2013 ). `` New Round of Voting Fails to Name a Pope ''. The New York Times. Retrieved March 13, 2013. Jump up ^ `` Afghan bomb makers shifting to new explosives for IEDs ''. USAToday.com. June 25, 2013. Retrieved 2013 - 06 - 25. `` Chlorate de potassium. Chlorate de sodium '', Fiche toxicol. n ° 217, Paris : Institut national de recherche et de sécurité, 2000. 4pp. Continuous process for the manufacture of potassium chlorate by coupling with a sodium chlorate production plant External links Wikimedia Commons has media related to Potassium chlorate. Potassium compounds KAsO KBr KBrO KCN KCNO KCl KClO KClO KF KH KHCO KHCO KHF KHS KHSO KHSO KH AsO KH PO KH PO KI KIO KIO KMnO KN KNH KNO KNO KOCN KOH KO KPF KSCN KCH COO K Al O K CO K CrO K Cr O K FeO K HPO K MnO K O K O K PtCl K PtCl K SeO K SO K SO KHSO K S O K S O K S O K Po K SiO K ( Fe ( CN ) ) K ( Fe ( C O ) ) K ( Fe ( CN ) ) K PO K Mo Cl Retrieved from `` https://en.wikipedia.org/w/index.php?title=Potassium_chlorate&oldid=806498770 '' Categories : Potassium compounds Chlorates Pyrotechnic oxidizers Hidden categories : Pages with URL errors Articles without EBI source Articles without KEGG source ECHA InfoCard ID from Wikidata Chembox having GHS data Articles containing unverified chemical infoboxes Chembox image size set All articles with unsourced statements Articles with unsourced statements from June 2009 Talk Contents About Wikipedia تۆرکجه Български Català Čeština Dansk Deutsch Español فارسی Français 한국어 Հայերեն Hrvatski Italiano Latviešu Magyar Nederlands 日本 語 Norsk Oʻzbekcha / ўзбекча پنجابی Polski Português Română Русский Simple English Slovenčina Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska తెలుగు Türkçe Українська Tiếng Việt 文言 中文 Edit links This page was last edited on 22 October 2017, at 12 : 23. 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Question: what is the name of the compound with the formula kclo
Answer: Potassium chlorate