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Chloride Ion

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Identification
Molecular formula
Cl-
CAS number
16887-00-6
IUPAC name
chloride
State
State

Chloride, in its ionic form, is usually encountered as part of a compound rather than as an isolated entity. It is found in various states depending on its compound form, such as solid in sodium chloride or dissolved in water in its ionic form.

Melting point (Celsius)
-101.50
Melting point (Kelvin)
171.65
Boiling point (Celsius)
-34.00
Boiling point (Kelvin)
239.15
General information
Molecular weight
35.45g/mol
Molar mass
35.4530g/mol
Density
2.1650g/cm3
Appearence

Chloride ions do not have a distinct appearance as they are part of ionic compounds. In solutions, chloride ions are colorless. When they form solid salts, the appearance can vary based on the cation, but common examples like sodium chloride (table salt) are white crystalline solids.

Comment on solubility

Solubility of Chloride Ion (Cl-)

The solubility of the chloride ion (Cl-) in various solvents can vary significantly based on several factors. Generally, chloride salts are among the most soluble ionic compounds in water. Consider the following points:

  • Water Solubility: Many chloride salts, such as sodium chloride (NaCl) and potassium chloride (KCl), are highly soluble in water.
  • Impact of Cations: The solubility of a chloride salt often depends on the cation it is paired with. For instance, lead(II) chloride (PbCl2) and silver chloride (AgCl) exhibit low solubility in water.
  • Temperature Influence: For some salts, increasing the temperature can enhance the solubility of chlorides, although this effect varies among different chloride compounds.
  • Ion Pairing: The presence of other ions in solution may affect the solubility through ion pairing, either increasing or decreasing the effective solubility of chlorides.
  • Organic Solvents: Chlorides tend to have low solubility in organic solvents due to their ionic nature; they are more compatible with polar solvents.

In summary, while the chloride ion itself is competent for solubility in polar environments, the actual solubility of chloride compounds depends on the specific cations and the environmental conditions surrounding them.

Interesting facts

Interesting Facts about Chloride (Cl-)

Chloride, represented by the symbol Cl-, is an anion that plays a vital role in various chemical and biological processes. As a highly reactive species, chloride is often found in combination with other elements, forming salts and contributing significantly to electrolyte balance.

Key Characteristics of Chloride:

  • Essential for Life: Chloride ions are crucial for maintaining osmotic balance in cells and ensuring proper hydration.
  • Role in Gastric Acid: In the human body, chloride is a key component of hydrochloric acid (HCl), which is essential for digestion and helps in killing pathogens.
  • Environmental Importance: Chloride is prevalent in nature, often found in seawater and various minerals, contributing to the chemical composition of aquatic ecosystems.
  • Industrial Applications: Chloride compounds, such as sodium chloride (table salt), are used in numerous industrial applications, including food preservation and chemical manufacturing.

Interestingly, while chloride is essential in small amounts, excessive chloride levels can indicate environmental stress and can result in the contamination of freshwater sources. In fact, "the balance of chloride in the environment can serve as a marker for ecosystem health." Furthermore, chloride's distinct properties and reactivity make it a subject of interest in various fields of study, including biochemistry and environmental science.

Overall, chloride is not just a simple ion but a compound with profound implications on health, industry, and the environment. Understanding its roles and behaviors can unlock further insights into both biological systems and ecological dynamics.

Synonyms
16887-00-6
chloride
chloride ion
Chloride anion
Chloride(1-)
Chloride (ion)
Chlorides
Chloride ions
Perchloride
Chlorine anion
Chlorine, ion
Pls216 protein
Cl-
UNII-Q32ZN48698
131500-00-0
Q32ZN48698
Hydrochloric acid, ion(1-)
Cl(-)
Cadmium manganese mercury telluride (Cd0.2Mn0.04Hg0.76Te)
DTXSID6043969
CHEBI:17996
Chloride - Cl(-) @1000microg/mL
.beta.-D-Galactopyranoside, 4-hydroxybutyl
139512-37-1
147258-25-1
155522-09-1
Chlorate Standard: ClO3- @ 1000 microg/mL in H2O
Chloride (from KCl) Standard: Cl- @ 100 microg/mL in H2O
Chloride (from NH4Cl) Standard: Cl- @ 10000 microg/mL in H2O
1,2-bis[4-fluoro-6-{4-sulfo-5-(2-(4-sulfonaphtalene-3-ylazo)-1-hydroxy-3,6-disulfo-8-aminonaphthalen
Chlorid
Chloride (from KCl) Standard: Cl- @ 1000 microg/mL in H2O
Chloride (from KCl) Standard: Cl- @ 10000 microg/mL in H2O
chloride salt
chloride salts
Chlorine ion
Chlorine-
Cl?
Chloride (Cl-)
Chlorine(1-)
Chlorine ion(1-)
Chloride ion (1-)
42 - Milk Powder
CHLORIDE STANDARD
CHLORIDE [VANDF]
Chlorine, ion (Cl1-)
3-Carbamoyl-1-ethoxymethylpyridinium chloride
14 - Anions on Filters
CHLORIDE [WHO-DD]
1-Butoxymethyl-3-carbamoyl-pyridinium; chloride
CHEMBL19429
Chloride (from KCl) Standard
5,9-bis-dimethylamino-benzo[a]phenoxazinylium, chloride
DTXCID4023969
BDBM26979
CHEBI:23114
28 - Chemical analysis of soaps
c0884
MFCD00143949
AKOS015903642
Chloride standard solution (8 ppm CI)
DB14547
54071-91-9
62770-30-3
01A - Major Ions in High Salinity Water
C00698
Q108200
Chloride Ion Chromatography Standard: Cl- @ 100microg/mL in H2O
Chloride Ion Chromatography Standard: Cl- @ 100microg/mL in H2O