Definitions for heteropoly acid
het·eropo·ly acid

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1. heteropoly acidnoun

   Any of a family of mixed oxyacids of metals (such as tungsten) and nonmetals (such as phosphorus)

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1. heteropoly acid

   In chemistry, the heteropolymetalates are a subset of the polyoxometalates, which consist of three or more transition metal oxyanions linked together by shared oxygen atoms to form a closed 3-dimensional molecular framework. In contrast to isopolymetalates, which contain only one kind of metal atom, the heteropolymetalates contain differing main group oxyanions. The metal atoms are usually group 6 (Mo, W) or less commonly group 5 (V, Nb, Ta) transition metals in their highest oxidation states. They are usually colorless to orange, diamagnetic anions. For most heteropolymetalates the W, Mo, or V, is complemented by main group oxyanions phosphate and silicate. Many exceptions to these general statements exist, and the class of compounds includes hundreds of examples.

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1. Heteropoly acid

   A heteropoly acid is a class of acid made up of a particular combination of hydrogen and oxygen with certain metals and non-metals. This type of acid is frequently used as a re-usable acid catalyst in chemical reactions. To qualify as a heteropoly acid, the compound must contain: ⁕a metal such as tungsten, molybdenum or vanadium, termed the addenda atom; ⁕oxygen; ⁕an element generally from the p-block of the periodic table, such as silicon, phosphorus or arsenic, termed the hetero atom; ⁕acidic hydrogen atoms. The metal addenda atoms linked by oxygen atoms form a cluster with the hetero-atom inside bonded via oxygen atoms. Examples with more than one type of metal addenda atom in the cluster are well known. The conjugate anion of a heteropoly acid is known as a polyoxometalate. Due to the possibilities of there being different combinations of addenda atoms and different types of hetero atoms there are a lot of heteropolyacids. Two of the better known groups of these are based on the Keggin, HnXM12O40, and Dawson, HnX2M18O62, structures. Some examples are: ⁕H4Xn+M12O40, X = Si, Ge; M = Mo, W ⁕H3Xn+M12O40, X = P, As; M = Mo, W ⁕H6X2M18O62, X=P, As; M = Mo, W The heteropolyacids are widely used as homogeneous and heterogeneous catalysts, particularly those based on the Keggin structure as they can possess qualities such as good thermal stability, high acidity and high oxidising ability. Some examples of catalysis are:

How to pronounce heteropoly acid?

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Numerology

1. Chaldean Numerology

   The numerical value of heteropoly acid in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of heteropoly acid in Pythagorean Numerology is: 3

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Heteropoly_Acid
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Heteropoly_Acid
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=heteropoly acid