Kalsium karbonat

Calcium carbonate
Jeneng IUPAC Calcium carbonate
Jeneng liya calcite; aragonite; chalk; Lime (material); Limestone; marble; oyster; pearl;
Identifikasi
Nomor CAS	[471-34-1]
PubChem	10112
Nomer EINECS	207-439-9
KEGG	D00932
ChEBI	CHEBI:3311
Nomer RTECS	FF9335000
SMILES	[Ca+2].[O-]C([O-])=O
InChI	1/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
Sifat
Rumus molekul	CaCO3
Massa molar	100.0869 g/mol
Panampilan	Fine white powder; chalky taste
Ambu	odorless
Densitas	2.711 g/cm3 (calcite) 2.83 g/cm3 (aragonite)
Titik leleh	1339 °C, 1612 K, 2442 °F
Titik umob	decomposes
Kelarutan dalam air	0.013 g/L (25 °C)[2][3]
Kelarutan dalam dilute acids	soluble
Kaasaman (pKa)	9.0
Struktur
Struktur kristal	Trigonal
Grup ruwang	32/m
Termokimia
Entalpi pambentukan standar (ΔfHo298)	−1207 kJ·mol−1[4]
Entropi molar standar So298	93 J·mol−1·K−1[4]
Bahaya
NFPA 704	0 0 0
U.S. Permissible exposure limit (PEL)	TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)[5]
Senyawa kagandhèng
Anion liyané	Calcium bicarbonate
Kation liyané	Beryllium carbonate Magnesium carbonate Strontium carbonate Barium carbonate Radium carbonate
Kejaba ditélakaké suwaliké, data ing ndhuwur kanggo ing suhu lan tekanan standar (25°C, 100 kPa) Sangkalan lan referensi

Kalsium karbonat minangka senyawa kimia kanthi rumus CaCO₃. Iki minangka zat umum sing ditemokaké ing watu minangka kalsit mineral lan aragonit (utamané minangka watu gamping, yaiku salah sawijining jinis watu sedimén sing biasané kalebu kalsit) lan minangka komponén utama kulit endhog, cangkang bekicot, cangkang kéwan sagara lan mutiara. Kalsium karbonat minangka bahan aktif ing pertanian lan digawé nalika ion kalsium ing banyu keras reaksi karo ion karbonat kanggo nggawé kerak. Kasedhiya panggunaan medis minangka suplemen kalsium utawa antasida, nanging konsumsi sing kaluwihan bisa mbebayani lan nyebabaké hiperkalskemia lan masalah pencernaan.^[6]

1. ↑ Benjamin, Mark M. (2002). Water Chemistry. McGraw-Hill. ISBN 978-0-07-238390-4.
2. ↑ Aylward, Gordon; Findlay, Tristan (2008). SI Chemical Data Book (édhisi ka-4th). John Wiley & Sons Australia. ISBN 978-0-470-81638-7.
3. ↑ Rohleder, J.; Kroker, E. (2001). Calcium Carbonate: From the Cretaceous Period Into the 21st Century. Springer Science & Business Media. ISBN 978-3-7643-6425-0.
4. ↑ ^{a b} Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. kc. A21. ISBN 978-0-618-94690-7.
5. ↑ Cithakan:PGCH
6. ↑ Strumińska-Parulska, DI (2015). "Determination of ²¹⁰Po in calcium supplements and the possible related dose assessment to the consumers". Journal of Environmental Radioactivity. 150: 121–125. doi:10.1016/j.jenvrad.2015.08.006. PMID 26318774.