Calcium carbonate

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Calcium carbonate
Calcium carbonate.png
Calcium-carbonate-xtal-3D-SF.png
Calcium carbonate.jpg
Names
IUPAC name
Calcium carbonate
Ither names
Identifiers
471-34-1 YesY
ATC code
ChEBI CHEBI:3311 YesY
ChEMBL ChEMBL1200539 N
ChemSpider 9708 YesY
EC-nummer [1]
Jmol-3D images Image
Image
KEGG D00932 YesY
PubChem
RTECS nummer FF9335000
UNII H0G9379FGK YesY
Properties
CaCO3
Molar mass 100.0869 g/mol
Appearance Fine white pouder; chalky taste
Odor odorless
Density 2.711 g/cm3 (calcite)
2.83 g/cm3 (aragonite)
Meltin pynt 825 °C (aragonite)
1339 °C (calcite)[1]
Boilin pynt decomposes
0.0013 g/100 mL (25°C)[2]
Solubility product, Ksp 4.8×10−9[3]
Solubility in dilute acids soluble
Acidity (pKa) 9.0
Refractive index (nD) 1.59
Structure
Crystal structur Trigonal
Space group 32/m
Thermochemistry
Std enthalpy o
formation
ΔfHo298
−1207 kJ·mol−1[4]
Staundart molar
entropy
So298
93 J·mol−1·K−1[4]
Hazards
Safety data sheet ICSC 1193
NFPA 704
Flammability code 0: Will nae burn. E.g., watter Health code 1: Exposur would cause irritation but anly minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash pynt {{{value}}}
Lethal dose or concentration (LD, LC):
6450 mg/kg (oral, rat)
Related compounds
Ither anions Calcium bicarbonate
Ither cations Magnesium carbonate
Strontium carbonate
Barium carbonate
Relatit compoonds Calcium sulfate
Except whaur otherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
 N verify (whit isYesY/N?)
Infobox references

Calcium carbonate is a chemical compoond wi the formula CaCO3. It is a common substance foond in rocks in aw pairts o the warld, an is the main component o shells o marine organisms, snails, coal balls, pearls, an eggshells. Calcium carbonate is the active ingredient in agricultural lime, an is creatit when Ca ions in haird watter react wi carbonate ions creatin limescale. It is commonly uised medicinally as a calcium supplement or as an antacid, but excessive consumption can be hazardous.

References[eedit | eedit soorce]

  1. "Occupational safety and health guideline for calcium carbonate" (PDF). US Dept. of Health and Human Services. Retrieved 31 March 2011. 
  2. Gordon Aylward, Tristan Findlay. SI Chemical Data Book (4th ed.). John Wiley & Sons Australia, Ltd. ISBN 978-0-470-81638-7. 
  3. Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. ISBN 0-07-049439-8. Retrieved 2009-06-06. 
  4. 4.0 4.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 0-618-94690-X. 

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