Calcium carbonate
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, pairls, 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.
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| Names | |||
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| IUPAC name
Calcium carbonate
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| Ither names | |||
| Identifiers | |||
3D model (JSmol)
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| ChEBI | |||
| ChEMBL | |||
| ChemSpider | |||
| EC Nummer | 207-439-9 | ||
| KEGG | |||
PubChem CID
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| RTECS nummer | FF9335000 | ||
| UNII | |||
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| Properties | |||
| CaCO3 | |||
| Molar mass | 100.0869 g/mol | ||
| Appearance | Fine white pouder; chalky taste | ||
| Odour | odorless | ||
| Density | 2.711 g/cm3 (calcite) 2.83 g/cm3 (aragonite) | ||
| Meltin pynt | 825 °C (aragonite) 1339 °C (calcite)[1][2] | ||
| Bylin pynt | decomposes | ||
| 0.0013 g/100 mL (25°C)[3] | |||
| Solubility product, Ksp | 4.8×10−9[4] | ||
| Solubility in dilute acids | soluble | ||
| Acidity (pKa) | 9.0 | ||
| Refractive index (nD) | 1.59 | ||
| Structur | |||
| Trigonal | |||
| Space group | 32/m | ||
| Thermochemistry | |||
| Staundart molar entropy S |
93 J·mol−1·K−1[5] | ||
| Std enthalpy o formation ΔfH |
−1207 kJ·mol−1[5] | ||
| Hazards | |||
| NFPA 704 | |||
| Flash pynt | 825 °C | ||
| Lethal dose or concentration (LD, LC): | |||
LD50 (Median dose)
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6450 mg/kg (oral, rat) | ||
| Relatit compoonds | |||
Ither anions
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Calcium bicarbonate | ||
Ither cations
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Magnesium carbonate Strontium carbonate Barium carbonate | ||
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |||
 verify (whit is   ?)
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| Infobox references | |||
References
eedit- ↑ "Prostadine".
- ↑ "Occupational safety and health guideline for calcium carbonate" (PDF). US Dept. of Health and Human Services. Retrieved 31 Mairch 2011.
- ↑ Gordon Aylward, Tristan Findlay. SI Chemical Data Book (4th ed.). John Wiley & Sons Australia, Ltd. ISBN 978-0-470-81638-7.
- ↑ Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. ISBN 0-07-049439-8. Retrieved 6 Juin 2009.
- ↑ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 0-618-94690-X.