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Calcium ion

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Identification
Molecular formula
Ca2+
CAS number
14127-61-8
IUPAC name
calcium(2+)
State
State

At room temperature, the calcium ion is typically found in an aqueous solution, such as in water or biological fluids, or as part of solid compounds like calcium carbonate or calcium sulfate.

Melting point (Celsius)
842.00
Melting point (Kelvin)
1 115.00
Boiling point (Celsius)
1 484.00
Boiling point (Kelvin)
1 757.00
General information
Molecular weight
40.08g/mol
Molar mass
40.0780g/mol
Density
1.5500g/cm3
Appearence

Calcium ions, in a solid state, generally appear as a white powder or as colorless crystals when in a hydrated form. In solution, calcium ions are invisible, but can be detected by their various reactions with reagents that precipitate calcium salts.

Comment on solubility

Solubility of Calcium Ions (Ca2+)

The solubility of calcium ions, represented as Ca2+, plays a crucial role in various chemical and biological processes. Here are some key points to consider:

  • General Solubility: Calcium ions are generally soluble in water, facilitating their availability in aqueous environments.
  • Influencing Factors: The solubility can be influenced by several factors, such as:
    • Temperature: Increased temperature often leads to enhanced solubility.
    • pH Levels: The solubility of calcium compounds may vary with changes in pH.
    • Presence of Other Ions: Competitive ion interactions can decrease the overall solubility of Ca2+.
  • Common Calcium Compounds: Certain calcium compounds have distinct solubility profiles:
    • Calcium carbonate (CaCO3) is practically insoluble in water.
    • Calcium chloride (CaCl2) is highly soluble in water.

In conclusion, while Ca2+ ions themselves are soluble, the solubility of calcium is best understood in the context of its compounds. As reported, "the behavior of calcium ions in solution is essential for the understanding of both geochemical processes and physiological functions." Thus, comprehending these solubility characteristics is key to leveraging calcium in various applications.

Interesting facts

Interesting Facts About Calcium Ion (Ca2+)

Calcium ions, represented as Ca2+, play a crucial role in numerous biological and chemical processes. Here are some intriguing aspects of this essential ion:

  • Biological Importance: Calcium is vital for various physiological functions in living organisms. It facilitates muscle contraction, nerve function, and blood clotting. In plants, it contributes to cell wall stability and growth.
  • Role in Signals: Calcium ions function as secondary messengers in signal transduction pathways, helping cells respond to external stimuli. For example, they play a key role in neurotransmitter release in neurons and hormonal responses.
  • Bone Health: Approximately 99% of the body's calcium is stored in bones and teeth, making it essential for maintaining structural integrity. Adequate calcium levels are integral to preventing osteoporosis and ensuring strong bone formation.
  • Water Hardness: Calcium contributes to water hardness, which impacts various industrial processes and influences the taste of water. In ecosystems, it supports aquatic life by influencing pH and nutrient availability.
  • Calcium Compounds: As a divalent cation, Ca2+ readily forms compounds such as calcium carbonate (found in limestone) and calcium sulfate (used in plaster and gypsum). These compounds have numerous applications in construction, agriculture, and manufacturing.

In conclusion, the calcium ion is not just a mere element but a vital player in the intricate dance of life and industry. Its diverse roles underscore the complexity and beauty of chemical interactions in both living organisms and the environment.

Synonyms
calcium ion
Calcium(2+)
Calcium cation
14127-61-8
Calcium ions
Ca2+
Calcium(2+)ions
Calcium(2+) ion
Calcium (2+)
Ca++
Calcium (II) ion
11079-03-1
Calcium, ion (Ca2+)
CALCIUM ION CHROMATOGRAPHY STANDARD
CaII
UNII-2M83C4R6ZB
2M83C4R6ZB
CALCIUM ION(2+)
ETHYLENEDIAMINETETRAACETIC ACID DISODIUM COBALT SALT, HYDRATE
CALCIUM, ION(CA2+)
Calcium(2+), hexaaqua-, (OC-6-11)-
DTXSID7037638
Ca(2+)
CHEBI:29108
calcium, doubly charged positive ion
125302-08-1
calcium cations
Ionized Calcium
Calcium dication
Free Calcium
calcium(II)
Cough Runny Nose
Peladow (chloride)
Snomelt (chloride)
Calcium 2+
calcium(II) cation
Calcosan (chloride)
Liquidow (chloride)
Eczema Skin Eruptions
BDBM14
Ca+2
Superflake anhydrous (chloride)
DTXCID5017638
45Ca2+
CHEBI:39123
CHEBI:39124
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Ethylenediamine-N,N,N',N'-tetraacetic acid cobalt-disodium salt
[45]Ca2+
CMC_10481
CMC_11731
CMC_12667
DB14577
C00076
L001014
Q23905776
Phenol, 4,4'-(1-methylethylidene)bis-, polymer with 2,2'-iminobis[ethanol], 2,2'-[(1-methylethylidene) bis(4,1-phenyleneoxymethylene)]bis[oxirane] and 4-nonylphenol