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Vanadium(III) oxide is the inorganic compound with the formula V 2 O 3.It is a black solid prepared by reduction of V 2 O 5 with hydrogen or carbon monoxide. [3] [4] It is a basic oxide dissolving in acids to give solutions of vanadium (III) complexes. [4]
Amphoteric is derived from the Greek word amphoteroi (ἀμφότεροι) meaning "both". Related words in acid-base chemistry are amphichromatic and amphichroic , both describing substances such as acid-base indicators which give one colour on reaction with an acid and another colour on reaction with a base.
An oxide is a chemical compound in which one or more oxygen atoms combined with another element, such as H 2 O or CO 2.Based on their acid-base characteristics, oxides can be classified into four categories: acidic oxides, basic oxides, and amphoteric oxides and neutral oxides.
Salt Point State Park is a state park in Sonoma County, California, United States. The park covers 6,000 acres (2,428 ha) on the coast of Northern California , with 20 miles (32 km) of hiking trails and over 6 miles (9.7 km) of a rough rocky coastline including Salt Point which protrudes into the Pacific Ocean .
A vanadium ore or vanadium-rich residue is treated with sodium carbonate and an ammonium salt to produce sodium metavanadate, NaVO 3. This material is then acidified to pH 2–3 using H 2 SO 4 to yield a precipitate of "red cake" (see above). The red cake is then melted at 690 °C to produce the crude V 2 O 5.
The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.
Pages in category "Amphoteric compounds" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
NiO rock salt crystal showing cation and oxygen vacancies. Defect sites can interfere with the stability of metal oxide surfaces, so it is important to locate and determine methods to control these sites. Oxides exhibit an abundance of point defect sites. In rocksalt surfaces, oxygen and metal cation vacancies are the