Sodium carbonate

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Sodium carbonate
Skeletal formula o sodium carbonate
Space-fillin model o sodium carbonate
Sample o sodium carbonate
Names
IUPAC name
Sodium carbonate
Ither names
Soda ash, Washin soda, Soda crystals
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.007.127
E nummer E500 (acidity regulators, ...)
RTECS nummer VZ4050000
UNII
Properties
Na2CO3
Molar mass 105.9888 g/mol
Appearance White solid, hygroscopic
Odour Odorless
Density 2.54 g/cm3 (25 °C, anhydrous)
1.92 g/cm3 (856 °C)
2.25 g/cm3 (monohydrate)[1]
1.51 g/cm3 (heptahydrate)
1.46 g/cm3 (decahydrate)[2]
Meltin pynt 851 °C (1,564 °F; 1,124 K)
Decahydrate:
7 g/100 mL (0 °C)
16.4 g/100 mL (15 °C)
34.07 g/100 mL (27.8 °C)
Heptahydrate:
48.69 g/100 mL (34.8 °C)
Monohydrate:
50.31 g/100 mL (29.9 °C)
48.1 g/100 mL (41.9 °C)
45.62 g/100 mL (60 °C)
43.6 g/100 mL (100 °C)[3]
Solubility Soluble in aq. alkalis,[3] glycerol
Slichtly soluble in aq. alcohol
Insoluble in CS2, acetone, alkyl acetates, alcohol, benzonitrile, liquid ammonia[4]
Solubility in glycerine 98.3 g/100 g (15.5 °C)[4]
Solubility in ethanediol 3.46 g/100 g (20 °C)[5]
Solubility in dimethylformamide 0.5 g/kg[5]
Basicity (pKb) 3.67
Magnetic susceptibility −4.1·10−5 cm3/mol[2]
Refractive index (nD) 1.485 (anhydrous)
1.420 (monohydrate)[6]
1.405 (decahydrate)
Viscosity 3.4 cP (887 °C)[5]
Structur
Monoclinic (γ-form, β-form, δ-form, anhydrous)[7]
Orthorhombic (monohydrate, heptahydrate)[1][8]
Space group C2/m, No. 12 (γ-form, anhydrous, 170 K)
C2/m, No. 12 (β-form, anhydrous, 628 K)
P21/n, No. 14 (δ-form, anhydrous, 110 K)[7]
Pca21, No. 29 (monohydrate)[1]
Pbca, No. 61 (heptahydrate)[8]
Pynt group 2/m (γ-form, β-form, δ-form, anhydrous)[7]
mm2 (monohydrate)[1]
2/m 2/m 2/m (heptahydrate)[8]
a = 8.920(7) Å, b = 5.245(5) Å, c = 6.050(5) Å (γ-form, anhydrous, 295 K)[7]
α = 90°, β = 101.35(8)°, γ = 90°
Octahedral (Na+, anhydrous)
Thermochemistry
Speceefic heat capacity, C 112.3 J/mol·K[2]
Staundart molar
entropy
So298
135 J/mol·K[2]
Std enthalpy o
formation
ΔfHo298
−1130.7 kJ/mol[2][5]
−1044.4 kJ/mol[2]
Hazards
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized Seestem o Classification an Labellin of Chemicals (GHS)[9]
GHS signal wird Warning
GHS hazard statements H319[9]
GHS precautionary statements P305+351+338[9]
NFPA 704
Lethal dose or concentration (LD, LC):
4090 mg/kg (rat, oral) [10]
Relatit compoonds
Ither anions
Sodium bicarbonate
Ither cations
Lithium carbonate
Potassium carbonate
Rubidium carbonate
Caesium carbonate
Relatit compoonds
Sodium sesquicarbonate
Sodium percarbonate
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
Infobox references

Sodium carbonate (an aa kent as washin soda, soda ash an soda crystals), Na2CO3, is a sodium saut o carbonic acid (soluble in watter).

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 Harper, J.P (1936). Antipov, Evgeny; Bismayer, Ulrich; Huppertz, Hubert; Petrícek, Václav; Pöttgen, Rainer; Schmahl, Wolfgang; Tiekink, E.R.T.; Zou, Xiaodong, eds. "Crystal Structure of Sodium Carbonate Monohydrate, Na2CO3. H2O". Zeitschrift für Kristallographie - Crystalline Materials. De Gruyter. 95 (1): 266–273. doi:10.1524/zkri.1936.95.1.266. ISSN 2196-7105. Retrieved 2014-07-25. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0. 
  3. 3.0 3.1 Seidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). New York: D. Van Nostrand Company. p. 633. 
  4. 4.0 4.1 Comey, Arthur Messinger; Hahn, Dorothy A. (1921-02). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 208–209.  Check date values in: |date= (help)
  5. 5.0 5.1 5.2 5.3 Anatolievich, Kiper Ruslan. "sodium carbonate". http://chemister.ru. Retrieved 2014-07-25.  Freemit airtin in |website= (help)
  6. 6.0 6.1 Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 861. ISBN 0-07-049439-8. 
  7. 7.0 7.1 7.2 7.3 Dusek, Michal; Chapuis, Gervais; Meyer, Mathias; Petricek, Vaclav (2003). "Sodium carbonate revisited" (PDF). Acta Crystallographica Section B. International Union of Crystallography. 59 (3): 337–352. doi:10.1107/S0108768103009017. ISSN 0108-7681. Retrieved 2014-07-25. 
  8. 8.0 8.1 8.2 Betzel, C.; Saenger, W.; Loewus, D. (1982). "Sodium Carbonate Heptahydrate". Acta Crystallographica Section B. International Union of Crystallography. 38 (11): 2802–2804. doi:10.1107/S0567740882009996. 
  9. 9.0 9.1 9.2 Sigma-Aldrich Co., Sodium carbonate. Retrieved on 2014-05-06.
  10. http://chem.sis.nlm.nih.gov/chemidplus/rn/497-19-8
  11. "Material Safety Data Sheet – Sodium Carbonate, Anhydrous" (PDF). http://www.conservationsupportsystems.com. ConservationSupportSystems. Retrieved 2014-07-25.  Freemit airtin in |website= (help)