What is the formula of sodium zincate

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Sodium tetrahydroxozincate is an inorganic chemical compound from the group of hydroxo complexes.

Table of Contents

Extraction and presentation


Sodium tetrahydroxozincate can be obtained by reacting water with sodium hydroxide and zinc or zinc oxide or zinc cyanide.[4][5][6]

\ ({\ displaystyle \ mathrm {Zn + 2 \ NaOH + 2 \ H_ {2} O \ longrightarrow Na_ {2} [Zn (OH) _ {4}] + H_ {2}}} \)
\ ({\ displaystyle \ mathrm {ZnO + 2 \ NaOH + H_ {2} O \ longrightarrow Na_ {2} [Zn (OH) _ {4}]}} \)

properties


Sodium tetrahydroxozincate is obtained in the form of colorless, thin, finely crystalline platelets.[1] Hydrolysis occurs in water. On moist CO2-containing air, the salt is also rapidly decomposed. In addition to Na2[Zn (OH)4] is with Na2ZnO2 Another metastable sodium zincate known, which has a crystal structure with the space groupP.21/c (Room group no. 14) Template: Room group / 14 has.[7] In addition, the sodium trihydroxy zincate Na [Zn (OH)3], the sodium trihydroxyzincate trihydrate Na [Zn (OH)3] · 3H2O and the sodium tetrahydroxozincate dihydrate Na2[Zn (OH)4] · 2H2O.[1]

use


Sodium tetrahydroxozincate can be used for electroplating with zinc.[8]

Individual evidence


  1. abcGeorg Brauer: Handbook of Preparative Inorganic Chemistry, Volume III, Ferdinand Enke Verlag, Stuttgart 1981, ISBN 3-432-87823-0, page 1765
  2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  3. ↑ Entry on sodium tetrahydroxozincate in the GESTIS substance database of the IFA, accessed on February 28, 2017 (JavaScript required).
  4. ↑ F. Goudriaan: The zincates of sodium. Equilibriums in the system Na2O-ZnO-H2O, in: KNAW, Proceedings, 22 I, 1919-1920, Amsterdam, 1919, pp. 179-189
  5. ↑ Gerhard Ertl, Helmut Knözinger, Jens Weitkamp: Preparation of Solid Catalysts. John Wiley & Sons, 2008, ISBN 3-527-62068-0, p. 40 (limited preview in Google Book Search).
  6. ^ Mordechay Schlesinger, Milan Paunovic: Modern electroplating. John Wiley & Sons, 2011, ISBN 1-118-06314-7, p. 287 (limited preview in Google Book Search).
  7. ↑ D. Trinschek, M. Jansen: Na2ZnO2, a New Sodium Zincate / Na2ZnO2, a New Sodium Zincate. In: Journal of Nature Research B. 51, 1996, doi: 10.1515 / znb-1996-0515.
  8. ↑ V. Jiricny, A. Roy, J. W. Evans: Electrodeposition of zinc from sodium zincate / hydroxide electrolytes in a spouted bed electrode. In: Metallurgical and Materials Transactions B. 31, 2000, p. 755, doi: 10.1007 / s11663-000-0113-0.









Categories:Sodium compound | Zinc compound | complex




Status of information: 02/24/2021 4:16:19 AM CET

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