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An oxyanion, or oxoanion, is an ion with the generic formula A x O z− y (where A represents a chemical element and O represents an oxygen atom). Oxyanions are formed by a large majority of the chemical elements. [1] The formulae of simple oxyanions are determined by the octet rule. The corresponding oxyacid of an oxyanion is the compound H z ...
The model is defined in terms of a list of those complex species which are present in solutions in significant amounts. In the present context the complex species have the general formula [M p O q (OH) r] n±. where p, q and r define the stoichiometry of the species and n± gives the electrical charge of the ion. The experimental data are ...
The number and identity of the oxyanions that exist between pH 13 and 2 depend on pH as well as concentration. For example, protonation of vanadate initiates a series of condensations to produce polyoxovanadate ions: [2] pH 9–12: HVO 2− 4, V 2 O 4− 7; pH 4–9: H 2 VO − 4, V 4 O 4− 12, HV 10 O 5− 28; pH 2–4: H 3 VO 4, H 2 V 10 O 4 ...
The dithionite is the oxyanion with the formula [S 2 O 4] 2−. [1] It is commonly encountered as the salt sodium dithionite. For historical reasons, it is sometimes called hydrosulfite, but it contains no hydrogen and is not a sulfite. [2] The dianion has a steric number of 4 and trigonal pyramidal geometry.
In chemistry, the perbromate ion is the anion having the chemical formula BrO − 4. It is an oxyanion of bromine, the conjugate base of perbromic acid, in which bromine has the oxidation state +7. [1] Unlike its chlorine (ClO − 4) and iodine (IO − 4) analogs, it is difficult to synthesize. [2] It has tetrahedral molecular geometry. [3]
In chemistry, a molybdate is a compound containing an oxyanion with molybdenum in its highest oxidation state of +6: O − −Mo(=O) 2 −O −. Molybdenum can form a very large range of such oxyanions, which can be discrete structures or polymeric extended structures, although the latter are only found in the solid state.
Periodate (/ p ə ˈ r aɪ. ə d eɪ t / pə-RY-ə-dayt) is an anion composed of iodine and oxygen.It is one of a number of oxyanions of iodine and is the highest in the series, with iodine existing in oxidation state +7.
Tellurite is a oxyanion of tellurium with the formula TeO 2− 3. It is the ion of tellurous acid, and is chemically related to tellurium dioxide (TeO 2), whose mineral appearance also bears the name tellurite. Tellurites are typically colorless or white salts, which in some ways are comparable to sulfite. [3]