Recent from talks
Nothing was collected or created yet.
Zinc nitrate
View on Wikipedia| Names | |
|---|---|
| IUPAC name
Zinc nitrate
| |
| Other names
Zinc dinitrate
| |
| Identifiers | |
| |
3D model (JSmol)
|
|
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.029.038 |
| EC Number |
|
PubChem CID
|
|
| RTECS number |
|
| UNII | |
| UN number | 1514 |
CompTox Dashboard (EPA)
|
|
| |
| |
| Properties | |
| Zn(NO3)2 | |
| Molar mass | 189.36 g/mol (anhydrous) 297.49 g/mol (hexahydrate) |
| Appearance | colorless, deliquescent crystals |
| Density | 2.065 g/cm3 (hexahydrate) |
| Melting point | 110 °C (230 °F; 383 K) (anhydrous) 45.5 °C (trihydrate) 36.4 °C (hexahydrate) |
| Boiling point | ~ 125 °C (257 °F; 398 K) decomposes (hexahydrate) |
| 327 g/(100 mL), 40 °C (trihydrate) 184.3 g/(100 mL), 20 °C (hexahydrate) | |
| Solubility | very soluble in alcohol |
| −63.0·10−6 cm3/mol | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
|
Oxidant, may explode on heating |
| GHS labelling: | |
| Flash point | Non-flammable |
| Safety data sheet (SDS) | ICSC 1206 |
| Related compounds | |
Other anions
|
Zinc sulfate Zinc chloride |
Other cations
|
Cadmium nitrate Mercury(II) nitrate |
Related compounds
|
Copper(II) nitrate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Zinc nitrate is an inorganic chemical compound with the formula Zn(NO3)2. This colorless, crystalline salt is highly deliquescent. It is typically encountered as a hexahydrate Zn(NO3)2·6H2O. It is soluble in both water and alcohol.
Synthesis
[edit]Zinc nitrate is usually prepared by dissolving zinc metal, zinc oxide, or related materials in nitric acid:
- Zn + 2 HNO3 → Zn(NO3)2 + H2
- ZnO + 2 HNO3 → Zn(NO3)2 + H2O
These reactions are accompanied by the hydration of the zinc nitrate.
The anhydrous salt arises by the reaction of anhydrous zinc chloride with nitrogen dioxide:[1]
- ZnCl2 + 4 NO2 → Zn(NO3)2 + 2 NOCl
Reactions
[edit]Treatment of zinc nitrate with acetic anhydride gives zinc acetate.[2]
On heating, zinc nitrate undergoes thermal decomposition to form zinc oxide, nitrogen dioxide and oxygen:
- 2 Zn(NO3)2 → 2 ZnO + 4 NO2 + 1 O2
Aqueous zinc nitrate contains aquo complexes [Zn(H2O)6]2+ and [Zn(H2O)4]2+.[3] and, thus, this reaction may be better written as the reaction of the aquated ion with hydroxide through donation of a proton, as follows.
Applications
[edit]Zinc nitrate has no large scale application but is used on a laboratory scale for the synthesis of coordination polymers.[4] Its controlled decomposition to zinc oxide has also been used for the generation of various ZnO based structures, including nanowires.[5]
It is used as a corrosion inhibitor. [6]
It can be used as a mordant in dyeing. An example reaction gives a precipitate of zinc carbonate:
References
[edit]- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 455. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
- ^ O. F. Wagenknecht; R. Juza (1963). "Zinc Acetate". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2. NY, NY: Academic Press. p. 1087.
- ^ Sze, Yu-Keung, and Donald E. Irish. "Vibrational spectral studies of ion-ion and ion-solvent interactions. I. Zinc nitrate in water." Journal of Solution Chemistry 7.6 (1978): 395-415.
- ^ Barnett, Sarah A; Champness, Neil R (November 2003). "Structural diversity of building-blocks in coordination framework synthesis—combining M(NO3)2 junctions and bipyridyl ligands". Coordination Chemistry Reviews. 246 (1–2): 145–168. doi:10.1016/S0010-8545(03)00121-8.
- ^ Greene, Lori E.; Yuhas, Benjamin D.; Law, Matt; Zitoun, David; Yang, Peidong (September 2006). "Solution-Grown Zinc Oxide Nanowires". Inorganic Chemistry. 45 (19): 7535–7543. doi:10.1021/ic0601900. PMID 16961338.
- ^ "Zinc nitrate uses". Amizara Speciality Chemicals LLP. 10 March 2025.
Zinc nitrate
View on GrokipediaGeneral properties
Chemical identity
Zinc nitrate is an inorganic compound with the chemical formula for the anhydrous form.[1] The molar mass of the anhydrous zinc nitrate is 189.4 g/mol.[1] It is systematically named zinc dinitrate.[1] Common names for the compound include zinc nitrate.[1] The compound is most commonly encountered as the hexahydrate, , which has a molar mass of 297.5 g/mol.[5] This hydrated form is referred to as zinc nitrate hexahydrate.[5] The hexahydrate is the stable form at room temperature.[5] Zinc nitrate consists of cations and anions arranged in an ionic crystalline lattice.[1] In the hexahydrate, six water molecules are incorporated into the structure.[5] The crystal structure of the hexahydrate is orthorhombic, belonging to the space group Pnma.[6]Physical characteristics
Zinc nitrate is typically encountered as the hexahydrate, Zn(NO₃)₂·6H₂O, which appears as colorless, transparent, deliquescent crystals that are highly hygroscopic, readily absorbing moisture from the air and potentially dissolving into a liquid state upon exposure.[5][7] The compound is odorless, with no characteristic taste noted due to its toxicity.[5] The density of the hexahydrate is 2.065 g/cm³ at 15–20 °C.[7][8] It has a low melting point of 36.4 °C for the hexahydrate, while the anhydrous form melts at approximately 110 °C but decomposes before fully melting.[7][9] Zinc nitrate decomposes upon heating before reaching a boiling point, exhibiting no stable vapor phase.[8][10] Zinc nitrate demonstrates high solubility in water, with the hexahydrate dissolving at approximately 184–200 g per 100 mL at 20 °C, attributed to its ionic composition facilitating strong hydration interactions.[8][9] It is also soluble in ethanol and ammonia but insoluble in organic solvents such as acetone.[7][5]Synthesis
Laboratory preparation
Zinc nitrate is primarily prepared in the laboratory by dissolving zinc metal in dilute nitric acid at room temperature, which produces hydrogen gas as a byproduct. The reaction follows the equationand requires careful control of the acid concentration to prevent side reactions, such as the evolution of nitrogen oxides (NO_x) that can occur with more concentrated acid. This method is straightforward and suitable for educational settings, as the reaction proceeds vigorously but controllably under ambient conditions.[11][12] An alternative laboratory synthesis involves the reaction of zinc oxide with nitric acid, which is an acid-base neutralization yielding water as the byproduct. The balanced equation is
and typically requires gentle heating to achieve complete dissolution of the relatively insoluble zinc oxide. This approach is useful when starting from zinc oxide, a common precursor, and avoids the generation of hydrogen gas.[13] Following synthesis, purification is achieved by evaporating the aqueous solution to induce crystallization of the hexahydrate form, Zn(NO₃)₂·6H₂O, which is the stable solid at room temperature due to its high solubility in water. For the anhydrous compound, the hexahydrate is subjected to dehydration under vacuum or in a desiccator with a hygroscopic agent to remove coordinated water molecules without thermal decomposition. These reactions generally afford high yields when acid concentration and reaction conditions are optimized to minimize losses from side products.[14][15]
