<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> The chloride ion / ˈklɔːraɪd / is the anion (negatively charged ion) Cl . It is formed when the element chlorine (a halogen) gains an electron or when a compound such as hydrogen chloride is dissolved in water or other polar solvents . Chloride 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 . Less frequently, the word chloride may also form part of the "common" name of chemical compounds in which one or more chlorine atoms are covalently bonded . For example, methyl chloride, with the standard name chloromethane (see IUPAC books) is an organic compound with a covalent C − Cl bond in which the chlorine is not an anion . </P> <P> A chloride ion is much larger than a chlorine atom, 167 and 99 pm, respectively . The ion is colorless and diamagnetic . In aqueous solution, it is highly soluble in most cases; however, some chloride salts, such as silver chloride, lead (II) chloride, and mercury (I) chloride are slightly soluble in water . In aqueous solution, chloride is bound by the protic end of the water molecules . </P>

In which form chloride is present in water
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