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Aluminium nitrate is a white, water-soluble salt of aluminium and nitric acid, most commonly existing as the crystalline hydrate, aluminium nitrate nonahydrate, Al(NO 3) 3 ·9H 2 O. Preparation [ edit ]
Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C Barium acetate: Ba(C 2 H 3 O 2) 2: 58.8: 62: 72: 75: 78.5: 77: 75
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Aluminium nitride (Al N) is a solid nitride of aluminium. It has a high thermal conductivity of up to 321 W/(m·K) [ 5 ] and is an electrical insulator. Its wurtzite phase (w-AlN) has a band gap of ~6 eV at room temperature and has a potential application in optoelectronics operating at deep ultraviolet frequencies.
The relatively complicated formula - [Cr(H 2 O) 6](NO 3) 3 •3H 2 O - betray a simple structure of this material. The chromium centers are bound to six aquo ligands, and the remaining volume of the solid is occupied by three nitrate anions and three molecules of water of crystallization. [3]
Al 2 O 3 + H 2 O + NaOH → NaAl(OH) 4 Al(OH) 3 + NaOH → NaAl(OH) 4. Except for SiO 2, the other components of bauxite do not dissolve in base. Upon filtering the basic mixture, Fe 2 O 3 is removed. When the Bayer liquor is cooled, Al(OH) 3 precipitates, leaving the silicates in solution. NaAl(OH) 4 → NaOH + Al(OH) 3
Al(OH) 3 is built up of double layers of hydroxyl groups with aluminium ions occupying two-thirds of the octahedral holes between the two layers. [ 5 ] [ 6 ] Four polymorphs are recognized. [ 7 ] All feature layers of octahedral aluminium hydroxide units, with hydrogen bonds between the layers.
In the NO − 3 anion, the oxidation state of the central nitrogen atom is V (+5). This corresponds to the highest possible oxidation number of nitrogen. Nitrate is a potentially powerful oxidizer as evidenced by its explosive behaviour at high temperature when it is detonated in ammonium nitrate (NH 4 NO 3), or black powder, ignited by the shock wave of a primary explosive.