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Atomistry » Zinc » Chemical Properties » Basic Zinc Nitrates | ||
Atomistry » Zinc » Chemical Properties » Basic Zinc Nitrates » |
Basic Zinc Nitrates
The following have been described: -
Ammoniates
Andre obtained the hydrated tetrammoniate, 3[Zn(NO3)2.4NH4]+2H2O, from the solution prepared by passing an excess of ammonia gas into zinc nitrate solution. The deliquescent crystals are very soluble in a little water, and readily decomposed by excess with the precipitation of zinc oxide. The warm aqueous solution also dissolves zinc oxide, and 3Zn(NO3)2.10ZnO.4NH4.18H2O, stable in air, insoluble in cold water and decomposed by hot, deposits from the filtered solution.
Anhydrous Zn(NO3)2.4NH4 is obtained by leading ammonia gas in excess through a saturated solution of zinc nitrate, adding alcohol, drying the precipitate, and finally warming it at 100° C. in a stream of ammonia. It absorbs a quantity of ammonia gas at room temperature that closely corresponds to the formation of the hexammoniate, and only a little more ammonia is absorbed on cooling to - 18° C. As the temperature is raised, evolution of gas commences distinctly at 30.5° C., and as the temperature rises further the tetrammoniate is formed, which decomposes at 206° C. Double Salt
The double salt, 3Zn(NO3)2.2Bi(NO3)3.24H2O, has been described.
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