Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Vanadium sulfate, 7-hydrate

The electrolyte used for the electrodeposition [37, 58] was a 1M aqueous vanadium sulfate oxide hydrate solution containing 50 %wt ethanol with a pH of 1.6. A standard... [Pg.95]

The group oxidation state of +5 is too high to allow the formation of simple ionic salts even for Nb and Ta, and in lower oxidation states the higher sublimation energies of these heavier metals, coupled with their ease of oxidation, again militates against the formation of simple salts of the oxoacids. As a consequence the only simple oxoanion salts are the sulfates of vanadium in the oxidation states +3 and +2. These can be crystallized from aqueous solutions as hydrates and are both strongly... [Pg.993]

The only simple sulfates of vanadium are formed in the oxidation states -1-3 and -1-2. Vanadium(III) sulfate can be crystallized as a hydrate from aqueous solution, and is strongly reducing. It gives rise to a series of alums of the type M V(S04)2-12H20, which have been shown to contain the [V(H206)] + ion. The ammonium alum, (NH4)V(S04)2 12H20, is obtained as air-stable blue violet crystals by electrolytic reduction of NH4[V03] in sulfuric acid.b ... [Pg.5027]

Vanadium is determined by ignition of the sulfate in air to vanadium(V) oxide. Sulfate is determined by dissolving a sample of the vanadium(III) sulfate in hot 3 N HNO3, adding about 1 ml. of 65 % hydrazine hydrate to reduce any vanadates which may have formed, and precipitating the sulfate as barium sulfate. Anal. Calcd. for V2(S04)s V, 26.12 SO4—, 73.88. Found V, 26.13 SO4", 74.16. [Pg.93]

Sulfates of trivalent vanadium can be obtained using hydrazine as the reducing agent and glacial acetic acid as the reaction medium. An intermediate, V(CH3COO)3, is formed under these conditions. Hydrates of Va(S04,)3, for example, Vg (804)3 9 HgO, can be prepared in this manner. [Pg.1283]


See other pages where Vanadium sulfate, 7-hydrate is mentioned: [Pg.5029]    [Pg.5028]    [Pg.96]    [Pg.391]    [Pg.511]    [Pg.391]    [Pg.604]    [Pg.950]    [Pg.94]    [Pg.2350]    [Pg.3290]    [Pg.698]    [Pg.382]   
See also in sourсe #XX -- [ Pg.7 , Pg.94 ]

See also in sourсe #XX -- [ Pg.7 , Pg.94 ]

See also in sourсe #XX -- [ Pg.7 , Pg.94 ]

See also in sourсe #XX -- [ Pg.7 , Pg.94 ]

See also in sourсe #XX -- [ Pg.7 , Pg.94 ]




SEARCH



Hydrated sulfates

Sulfates hydration

© 2024 chempedia.info