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The '''chloride ]''' is the ] (negatively charged ion) '''Cl<sup>−</sup>'''. it is formed when the ] ] (a ]) gains an ] toor formwhen an ] (negatively charged ion) '''Cl<sup>−</sup>'''. Thea ]s ofsuch as ] containis chloridedissolved ionsin andwater canor alsoother bepolar calledsolvents. '''chloridesChlorides'''. The chloride ion, and its salts such as ], are often very soluble in water.<ref>Green, John, and Sadru Damji. "Chapter 3." Chemistry. Camberwell, Vic.: IBID, 2001. Print.</ref> It is an essential ] located in all body fluids responsible for maintaining acid/base balance, transmitting ] and regulating fluid in and out of cells.<ref>{{Cite web|url = http://ghr.nlm.nih.gov/glossary=chlorideion|title = Chloride ion - Glossary Entry - Genetics Home Reference|work = Genetics Home Reference|location = USA|publisher = National Library of Medicine|accessdate = 28 March 2011}}</ref> The word ''chloride'' can also form part of the name of ]s in which one or more chlorine ]s are ]. For example, methyl chloride, more commonly called ], (CH<sub>3</sub>Cl) is an organic covalently bonded compound, which does not contain a chloride ion.
==Occurrence in nature==
The word ''chloride'' can also form part of the name of ]s in which one or more chlorine ]s are ]. For example, methyl chloride, more commonly called ], (CH<sub>3</sub>Cl) is an organic covalently bonded compound, which does not contain a chloride ion.
Sea water contains a 1.94% chloride. Some chloride-containing minerals include the chlorides of sodium (] or NaCl), potassium (] or KCl), and magnesium (], hydrated MgCl<sub>2</sub>. Called ], the concentration of chloride in the blood is regulated by the kidneys. A chloride ion is a structural component of some proteins, e.g., it is present in the ] enzyme.
==Role in commerce==
==Corrosion==▼
The ] industry is a major consumer of the world's energy budget. This process converts sodium chloride into chlorine and sodium hydroxide, which are used to make many other materials and chemicals. The process involves two parallel reactions:
The presence of chlorides, e.g. in ], significantly aggravates the conditions for ] of most metals (including stainless steels and high-alloyed materials) by enhancing the formation and growth of the pits through an autocatalytic process.▼
:2 Cl<sup>–</sup> → {{chem|Cl|2}} + 2 ]
:2 {{chem|H|2|O}} + 2 e<sup>–</sup> → H<sub>2</sub> + 2 OH<sup>–</sup>
] of brine. At the anode ('''A'''), chloride (Cl<sup>−</sup>) is oxidized to chlorine. The ion-selective membrane ('''B''') allows the counterion Na+ to freely flow across, but prevents anions such as hydroxide (OH<sup>−</sup>) and chloride from diffusing across. At the cathode ('''C'''), water is reduced to hydroxide and hydrogen gas.]]
===Water quality and processing===
==Uses==Another major application involving chloride is ], which involves the energy intensive removal of chloride salts to give potable water. In the ], the chlorides are a closely monitored constituent of the ]. An increase of the chlorides in the mud system may be an indication of drilling into a high-pressure saltwater formation. Its increase can also indicate the poor quality of a target sand.{{Citation needed|date=March 2012}}▼Chloride is used to form salts that can preserve food such as ]. Other salts such as ], ], ] have varied uses ranging from medical treatments to cement formation.<ref>Green, John, and Sadru Damji. "Chapter 3." Chemistry. Camberwell, Vic.: IBID, 2001. Print.</ref>Chloride is also a useful and reliable chemical indicator of river / groundwater fecal contamination, as chloride is a non-reactive solute and ubiquitous to sewage & potable water. Many water regulating companies around the world utilize chloride to check the contamination levels of the rivers and potable water sources.<ref>http://www.gopetsamerica.com/substance/chlorides.aspx</ref>▼An example is table salt, which is ] with the ] NaCl. In ], it dissociates into Na<sup>+</sup> and Cl<sup>−</sup> ions.
===Domestic uses===
Examples of inorganic covalently bonded chlorides that are used as ]s are:
Chloride salts such as ] is used to preserve food.
*], ], and ], all three of which reactive chlorinating ]s that have been used in a ]▼*] (S<sub>2</sub>Cl<sub>2</sub>), used for ] of ].▲===Corrosion===
A chloride ion is also the prosthetic group present in the ] enzyme.▲The presence of chlorides, e.g. in ], significantly aggravates the conditions for ] of most metals (including stainless steels and high-alloyed materials) by enhancing the formation and growth of the pits through an autocatalytic process.
:]
Another example is ] with the ] CaCl<sub>2</sub>. Calcium chloride is a salt that is marketed in ] form for removing dampness from rooms. Calcium chloride is also used for maintaining unpaved roads and for fortifying roadbases for new construction. In addition, Calcium chloride is widely used as a ] since it is effective in lowering the ] when applied to ice.<ref>"Common Salts." Test Page for Apache Installation. Web. 22 Mar. 2011. <http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/saltcom.html>.</ref>▼
:]
▲In the ], the chlorides are a closely monitored constituent of the ]. An increase of the chlorides in the mud system may be an indication of drilling into a high-pressure saltwater formation. Its increase can also indicate the poor quality of a target sand.{{Citation needed|date=March 2012}}
▲Chloride is also a useful and reliable chemical indicator of river / groundwater fecal contamination, as chloride is a non-reactive solute and ubiquitous to sewage & potable water. Many water regulating companies around the world utilize chloride to check the contamination levels of the rivers and potable water sources.<ref>http://www.gopetsamerica.com/substance/chlorides.aspx</ref>
==Reactions of chloride==
== Human health ==
Chloride can be oxidized but not reduced. The first oxidation, as demonstrated in the chlor-alkali process, is conversion to chlorine gas. Chloride can be further oxidized to other oxides and and oxyanions including hypochlorite (ClO<sup>-</sup>, the active ingredient in ]), ] (ClO<sub>2</sub>), ] (ClO<sub>3</sub><sup>-</sup>), and ] (ClO<sub>4</sub><sup>-</sup>).
Ionic chloride salts reaction with other salts to exchange anions. The presence of chloride is often detected by its formation of an insoluble ] upon treatment with silver ion:
{{main|Serum chloride}}
: Cl<sup>-</sup> + Ag<sup>+</sup> → AgCl
Chloride is a chemical the human body needs for metabolism (the process of turning food into energy).<ref>http://www.med.umich.edu/1libr/aha/aha_schlorid_crs.htm</ref> It also helps keep the body's acid-base balance. The amount of chloride in the blood is carefully controlled by the kidneys.
==Examples==
''Further reading: ]''▼▲An example is table salt, which is ] with the ] NaCl. In ], it dissociates into Na<sup>+</sup> and Cl<sup>−</sup> ions. Salts such as ], ], ] have varied uses ranging from medical treatments to cement formation.<ref>Green, John, and Sadru Damji. "Chapter 3." Chemistry. Camberwell, Vic.: IBID, 2001. Print.</ref> Another example is ] with the ] CaCl<sub>2</sub>. Calcium chloride is a salt that is marketed in ] form for removing dampness from rooms. Calcium chloride is also used for maintaining unpaved roads and for fortifying roadbases for new construction. In addition, Calcium chloride is widely used as a ] since it is effective in lowering the ] when applied to ice.<ref>"Common Salts." Test Page for Apache Installation. Web. 22 Mar. 2011. <http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/saltcom.html>.</ref>
▲*Examples of covalently bonded chlorides are ], ], and ], all three of which reactive chlorinating ]s that have been used in a ].
== Other derivatives ==
==Further reading==
Organic and inorganic anions are produced from chloride, including:▲''Further reading: ]''*]*]*]*]*]*]
== References ==
The chloride ion is the anion (negatively charged ion) Cl. it is formed when the elementchlorine (a halogen) gains an electron or when a salts such as hydrochloric acid is dissolved in water or other polar solvents. Chlorides salts such as sodium chloride are often very soluble in water. It is an essential electrolyte located in all body fluids responsible for maintaining acid/base balance, transmitting nerve impulses and regulating fluid in and out of cells. The word chloride can also form part of the name of chemical compounds in which one or more chlorine atoms are covalently bonded. For example, methyl chloride, more commonly called chloromethane, (CH3Cl) is an organic covalently bonded compound, which does not contain a chloride ion.
Occurrence in nature
Sea water contains a 1.94% chloride. Some chloride-containing minerals include the chlorides of sodium (halite or NaCl), potassium (sylvite or KCl), and magnesium (bischofite, hydrated MgCl2. Called serum chloride, the concentration of chloride in the blood is regulated by the kidneys. A chloride ion is a structural component of some proteins, e.g., it is present in the amylase enzyme.
Role in commerce
The chlor-alkali industry is a major consumer of the world's energy budget. This process converts sodium chloride into chlorine and sodium hydroxide, which are used to make many other materials and chemicals. The process involves two parallel reactions:
Basic membrane cell used in the electrolysis of brine. At the anode (A), chloride (Cl) is oxidized to chlorine. The ion-selective membrane (B) allows the counterion Na+ to freely flow across, but prevents anions such as hydroxide (OH) and chloride from diffusing across. At the cathode (C), water is reduced to hydroxide and hydrogen gas.
Water quality and processing
Another major application involving chloride is desalination, which involves the energy intensive removal of chloride salts to give potable water. In the petroleum industry, the chlorides are a closely monitored constituent of the mud system. An increase of the chlorides in the mud system may be an indication of drilling into a high-pressure saltwater formation. Its increase can also indicate the poor quality of a target sand.
Chloride is also a useful and reliable chemical indicator of river / groundwater fecal contamination, as chloride is a non-reactive solute and ubiquitous to sewage & potable water. Many water regulating companies around the world utilize chloride to check the contamination levels of the rivers and potable water sources.
Domestic uses
Chloride salts such as sodium chloride is used to preserve food.
Corrosion
The presence of chlorides, e.g. in seawater, significantly aggravates the conditions for pitting corrosion of most metals (including stainless steels and high-alloyed materials) by enhancing the formation and growth of the pits through an autocatalytic process.
Crystals of sodium chloride, which, like most chloride salts is colorless and water-soluble.
The structure of sodium chloride, revealing the tendency of chloride ions (green spheres) to link to several cations.
Reactions of chloride
Chloride can be oxidized but not reduced. The first oxidation, as demonstrated in the chlor-alkali process, is conversion to chlorine gas. Chloride can be further oxidized to other oxides and and oxyanions including hypochlorite (ClO, the active ingredient in chlorine bleach), chlorine dioxide (ClO2), chlorate (ClO3), and perchlorate (ClO4).
Ionic chloride salts reaction with other salts to exchange anions. The presence of chloride is often detected by its formation of an insoluble silver chloride upon treatment with silver ion:
Cl + Ag → AgCl
Examples
An example is table salt, which is sodium chloride with the chemical formula NaCl. In water, it dissociates into Na and Cl ions. Salts such as calcium chloride, magnesium chloride, potassium chloride have varied uses ranging from medical treatments to cement formation. Another example is calcium chloride with the chemical formula CaCl2. Calcium chloride is a salt that is marketed in pellet form for removing dampness from rooms. Calcium chloride is also used for maintaining unpaved roads and for fortifying roadbases for new construction. In addition, Calcium chloride is widely used as a De-icer since it is effective in lowering the melting point when applied to ice.
