Vanadium chloride 6-hydrate

Calcium Metavanadate, Ca(V03)2.3H20, gives rise to bright yellow needles when a solution of ammonium metavanadate is boiled with calcium chloride solution and precipitated with alcohol.6 The tetra-hydrate, Ca(V03)2.4H20, is prepared by allowing a mixture of potassium metavanadate and calcium chloride to evaporate for several days.7 Anhydrous calcium metavanadate is a white, porous substance, which is unaffected by strong heating, but is readily decomposed by acids to yield vanadium pentoxide.8 It is much more soluble in water than strontium metavanadate. 

Vanadium Nitrates.—No nitrates of vanadium have been isolated. When hypovanadic oxide is dissolved in nitric acid the blue solution which results probably contains vanadyl nitrate, V0(N03)2, but on evaporation oxidation ensues and hydrated vanadium pentoxide is obtained. Blue solutions of vanadyl nitrate arc more conveniently obtained by precipitating vanadyl chloride with silver nitrate or vanadyl sulphate with barium nitrate. Addition of nitric acid to hexammino-vanadium trichloride yields hexammino-vanadium nitrate,10 [V (NH3)6](N03)3. 

Vanadium, powder by reduction of oxide with calcium, 6 50 Vanadium(II) chloride, 4 126 Vanadium (III) chloride, 4 128 6-hydrate, 4 130... 

Calcium dihydrogen orthophosphate 1-hydrate, synthesis 5 Calcium hydrogen orthophosphate, synthesis 6 Arsenic(III) fluoride, synthesis 50 Bismuth (III) iodide, synthesis 38 Vanadium(II) chloride, synthesis... 

Vanadium(II) chloride forms apple-green leaflets which behave toward water somewhat like chromium (II) chloride.5 They may be wetted slowly by water. The salt is soluble in water, forming the violet hydrated vanadium(II) ion. This ion is readily oxidized by the oxygen of the air and by hydrogen ion. The salt dissolves in alcohol and ether, the resulting solutions being respectively blue and greenish yellow.3... 

TiCU is produced by the reduction of the tetrachloride with hydrogen or a metal like silver or mercury. When heated in the air it breaks up, giving the volatile tetrachloride and the solid dichloride. TiCl is deli quescent, forms a reddish violet solution with water, and violet crystals, TiCU 6 H20, from a hydrochloric acid solution. An unstable green hydrate of the same composition is formed when an aqueous solution of the trichloride is covered with ether and saturated at 0° with HC1. From the violet form all the chlorine may be removed by AgNO , but this is probably not true of the green modification. The trichlorides of chromium and vanadium likewise are known in two forms. TiCla forms double salts with the chlorides of rubidium and caesium. It is a more powerful reducing agent than stannous chloride and on this account finds extensive application in both qualitative and quantitative analysis. 

See also Lithium hydroxide and lithium oxide, synthesis 1 Vanadium(II) hydroxide, synthesis 30 Uranyl chloride 1-hydrate, synthesis 41 Chlorine (CP )-labeled thionyl chloride, silicon tetrachloride, boron chloride, germanium(IV) chloride, and phos-phorus(III) chloride, synthesis 44 Inner complexes of cobalt(III) with diethylenetriamine, synthesis 56... 

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