Vanadium(V) Oxide
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High Quality Content by WIKIPEDIA articles! V2O5 is an amphoteric oxide. Thus it reacts with strong non-reducing acids to form solutions containing the pale yellow salts containing dioxovanadium(V) centers: V2O5 + 2HNO3 2VO2(NO3) + H2O It also reacts with strong alkali to form polyoxovanadates, which have a complex structure that depends on pH.If excess aqueous sodium hydroxide is used, the product is a colourless salt, sodium orthovanadate, Na3VO4. If acid is slowly added to a solution of Na3VO4, the colour gradually deepens through orange to red before brown hydrated V2O5 precipitates around...
High Quality Content by WIKIPEDIA articles! V2O5 is an amphoteric oxide. Thus it reacts with strong non-reducing acids to form solutions containing the pale yellow salts containing dioxovanadium(V) centers: V2O5 + 2HNO3 2VO2(NO3) + H2O It also reacts with strong alkali to form polyoxovanadates, which have a complex structure that depends on pH.If excess aqueous sodium hydroxide is used, the product is a colourless salt, sodium orthovanadate, Na3VO4. If acid is slowly added to a solution of Na3VO4, the colour gradually deepens through orange to red before brown hydrated V2O5 precipitates around pH 2. These solutions contain mainly the ions HVO42 and V2O74 between pH 9 and pH 13, but below pH 9 more exotic species such as V4O124 and HV10O285 predominate. Thionyl chloride converts it to VOCl3: V2O5 + 3SOCl2 2VOCl3 + 3SO2
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