What is the decomposition of zinc nitrate

Zinc nitrate

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Zinc nitrate [Zn (NO3)2] is the zinc salt of nitric acid.

Extraction and presentation

Zinc nitrate containing water is formed when zinc reacts with nitric acid.

$ \ mathrm {Zn + 2 \ HNO_ {3 \ (aq)} + 6H_2O \ longrightarrow Zn (NO_3) _2 \ cdot 6 \ H_2O + H_2 \ uparrow} $

On the other hand, anhydrous zinc nitrate cannot be obtained in this way. Instead, it is possible to obtain this by reacting nitrous tetroxide and zinc.

$ \ mathrm {2 \ Zn + 3 \ N_2O_4 \ longrightarrow 2 \ Zn (NO_3) _2 + N_2 \ uparrow} $

properties

Zinc nitrate is a colorless, oxidizing solid. It decomposes when heated, with nitrogen oxides and zinc oxide being formed and water of crystallization being given off above 105 ° C.[1]

Several salts with different amounts of water of crystallization are known of zinc nitrate. The best known contains six equivalents of water (hexahydrate), but hydrates with two, four or nine water molecules are also known.

use

Zinc nitrate is used as a catalyst in the crease-proofing of textiles, as a component of latex coagulation baths, in electroplating and in dyeing of acetate fibers.[1]

It is used as a bleaching and pickling agent, as well as for the extraction of other zinc compounds.

Individual evidence

  1. 1,001,011,021,031,041,051,061,071,081,091,10Entry to Zinc nitrate in the GESTIS substance database of the IFA, accessed on November 15, 2007 (JavaScript required).
  2. ^ Applichen: zinc nitrate hexahydrate
  3. ↑ Since December 1, 2012, only GHS hazardous substance labeling has been permitted for substances. Until June 1, 2015, the R-phrases of this substance may still be used to classify preparations, after which the EU hazardous substance labeling is of purely historical interest.