Molybdic acid

Molybdic acid
Molybdic acid
Identifiers
CAS number 7782-91-4
ChemSpider 74188
EC number 231-970-5
Jmol-3D images Image 1
Properties
Molecular formula MoO3·H2O
Molar mass 161.95 g mol-1 [1]
Density 3.1 g cm-3 [1]
Solubility in water 1510 mg dm-3 [2]
Hazards
R-phrases R36/37/38 [1]
S-phrases S24/25, S22 [1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Molybdic acid refrs to solid, hydrated forms of molybdenum trioxide and species in aqueous solution.

The simplest solid form, the monohydrate, is MoO3·H2O, though the dihydrate (MoO3·2H2O) is also known. The solid state structure of MoO3·H2O consists of layers of octahedrally coordinated MoO5·(H2O) units where 4 vertices are shared.[3]. The dihydrate has the same layer structure with the extra H2O molecule intercalated between the layers.

In aqueous solutions of acidified molybdate salts low concentration molecular O3Mo·3H2O has been characterised spectroscopically.[4]

The salts of molybdic acid are called molybdates.

References

  1. ^ a b c d http://www.chemicalbook.com/ChemicalProductProperty_EN_CB8854324.htm
  2. ^ http://www.chemspider.com/RecordView.aspx?rid=e75000d7-a392-4602-8ca4-f2bd1f94b31c
  3. ^ Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6
  4. ^ Solution structure of molybdic acid from Raman spectroscopy and DFT analysis, Oyerindea O.F., Week C.L., Anbarb A.D., Spiro T.G. Inorganica Chimica Acta, 361, 4, (2008), 1000-1007, doi:10.1016/j.ica.2007.06.025



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  • molybdic acid 85 percent — noun see molybdic acid …   Useful english dictionary

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  • Molybdic acid — Молибденовая кислота …   Краткий толковый словарь по полиграфии

  • molybdic acid — /məlɪbdɪk ˈæsəd/ (say muhlibdik asuhd) noun a yellowish crystalline solid, MoO3.2H2O …  

  • molybdic — /meuh lib dik/, adj. Chem. of or containing molybdenum, esp. in the trivalent or hexavalent states, as molybdic acid, H2MoO4. [1790 1800; MOLYBD(ENUM) + IC] * * * …   Universalium

  • phosphomolybdic acid — “+... noun Etymology: International Scientific Vocabulary phosph + molybdic : any of several heteropoly acids obtainable from solutions of phosphoric acid and molybdic acid and used chiefly as precipitants (as for alkaloids and for basic dyes for …   Useful english dictionary

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