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VO 2+, often in an ionic pairing with sodium (NaH 2 VO 4), is the second most abundant transition metal in seawater, with its concentration only being exceeded by molybdenum. [4] In the ocean the average concentration is 30 nM. Some mineral water springs also contain the ion in high concentrations.
Oxygen gas (O 2) can be toxic at elevated partial pressures, leading to convulsions and other health problems. [119] [k] [136] Oxygen toxicity usually begins to occur at partial pressures more than 50 kilopascals (kPa), equal to about 50% oxygen composition at standard pressure or 2.5 times the normal sea-level O 2 partial pressure of about 21 kPa.
The doublet state requires an odd number of electrons, and so cannot occur in dioxygen without gaining or losing electrons, such as in the superoxide ion (O − 2) or the dioxygenyl ion (O + 2). The ground state of O 2 has a bond length of 121 pm and a bond energy of 498 kJ/mol. [ 3 ] It is a colourless gas with a boiling point of −183 °C ...
The phosphite ion, PO 3− 3, is a strong base, and so always carries at least one proton. In this case the proton is attached directly to the phosphorus atom with the structure HPO 2− 3. In forming this ion, the phosphite ion is behaving as a Lewis base and donating a pair of electrons to the Lewis acid, H +. Predominance diagram for chromate
V 2 O 5 + SO 2 → 2 VO 2 + SO 3. The catalyst is regenerated by oxidation with air: 4 VO 2 + O 2 → 2 V 2 O 5. Similar oxidations are used in the production of maleic anhydride: C 4 H 10 + 3.5 O 2 → C 4 H 2 O 3 + 4 H 2 O. Phthalic anhydride and several other bulk organic compounds are produced similarly.
Vanadium(IV) oxide or vanadium dioxide is an inorganic compound with the formula VO 2.It is a dark blue solid. Vanadium(IV) dioxide is amphoteric, dissolving in non-oxidising acids to give the blue vanadyl ion, [VO] 2+ and in alkali to give the brown [V 4 O 9] 2− ion, or at high pH [VO 4] 4−. [4]
Conventionally this ion is represented with a single double bond, however this is a resonance form as the ion is a regular tetrahedron with four equivalent oxygen atoms. Additionally a range of polyoxovanadate ions exist which include discrete ions and "infinite" polymeric ions. [ 2 ]
Notice that oxygen forms three bonds to titanium and titanium forms six bonds to oxygen. An oxide (/ ˈ ɒ k s aɪ d /) is a chemical compound containing at least one oxygen atom and one other element [1] in its chemical formula. "Oxide" itself is the dianion (anion bearing a net charge of –2) of oxygen, an O 2– ion with oxygen in the ...