Is LiNO3 soluble

Lithium nitrate

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Lithium nitrate is a chemical compound with the empirical formula LiNO3which is naturally in the form of the trihydrate LiNO3· 3 H2O occurs. It is the lithium salt of nitric acid.

Extraction and presentation

Lithium nitrate is produced by converting lithium carbonate[5] or lithium hydroxide[6] with nitric acid.

$ \ mathrm {Li_2CO_3 + 2 \ HNO_3 \ longrightarrow 2 \ LiNO_3 + \ CO_2 + \ H_2O} $
$ \ mathrm {LiOH + \ HNO_3 \ longrightarrow \ LiNO_3 + \ H_2O} $

properties

The colorless, hygroscopic salt has a molar mass of 68.95 g / mol, a density of 2.36 g · cm−3 and a melting temperature of 264 ° C. At temperatures above 600 ° C, decomposition takes place. Lithium nitrate is very soluble in ethanol and water. In addition to the anhydrous crystal form, lithium nitrate also occurs as a trihydrate, which occurs at 28.8 ° C[7] releases its crystal water. Supercooled melts of the hydrate are very stable, but can be made to crystallize instantaneously by adding crystalline lithium nitrate.

use

Contrary to popular belief[5] becomes LiNO3 not used for red light or signal sets. At the flame temperatures typical for pyrotechnic flares, there is always a strong excitation of the Li sub-series lines, which creates an overall red-orange color impression, which can be achieved more easily by using calcium salts[8]. Lithium nitrate is used as a heat transfer medium[9] used. It can also be used to produce other lithium compounds. Lithium nitrate is also considered to be in a mixture with potassium nitrate Sabalith sold. This low-melting eutectic is used for the salt bath vulcanization of rubber compounds.[10] Lithium nitrate trihydrate was also used to cool the lander of the Venera mission, as it absorbs heat when it melts (melting point of the trihydrate approx. 30 ° C) and thus ensures a continuous temperature of 30 ° C until it is completely melted.[11]

Crystalline lithium nitrate

Individual evidence

  1. 1,01,1Helmut Sitzmann, in: Römpp Online - Version 3.5, 2009, Georg Thieme Verlag, Stuttgart.
  2. 2,02,12,22,32,4data sheet Lithium nitrate at Merck, accessed January 19, 2011.
  3. 3,03,13,2data sheet Lithium nitrate at Sigma-Aldrich, accessed April 8, 2011.
  4. ↑ Since December 1, 2012, only GHS hazardous substance labeling has been permitted for substances. The R-phrases of this substance may still be used to classify preparations until June 1, 2015, after which the EU hazardous substance labeling is of purely historical interest.
  5. 5,05,1A. F. Holleman, E. Wiberg, N. Wiberg, Inorganic Chemistry Textbook1995, 101st edition, de Gruyter. ISBN 3-11-012641-9, p. 1154.
  6. ↑ D. L. Perry, S. L. Phillips: Handbook of Inorganic Compounds: An Electronic Database. CRC Press, 1995, ISBN 978-0-8493-8671-8, p. 228.
  7. ↑ A. N. Campbell: The Systems: LiNO3-NH4NO3 and LiNO3-NH4NO3-H2O. In: Journal of the American Chemical Society. 64, 1942, pp. 2680-2684, doi: 10.1021 / ja01263a043.
  8. ↑ E.-C. Koch, Evaluation of Lithium Compounds as Color Agents for Pyrotechnic Flames, J. Pyrotech 13, 2001, 1.
  9. ↑ European patent EP0363678 1989, Metzler GmbH.
  10. ↑ Winnacker, Küchler: Chemical engineering: processes and products.2006, Wiley-VCH Weinheim, ISBN 3-527-31578-0.
  11. ↑ www.Bernd-leitenberger.de.