Molybdenum acid is an inorganic compound, an oxygen-containing acid formed by a molybdenum metal with the formula H 2 MoO 4 , colorless (white) crystals, slightly soluble in water, forms crystalline hydrates .
| Molybdenum acid | |
|---|---|
| Are common | |
| Systematic name | Molybdenum acid |
| Chem. formula | H 2 MoO 4 |
| Physical properties | |
| condition | colorless (white) crystals |
| Molar mass | 161.95 g / mol |
| Density | 3.112 g / cm³ |
| Thermal properties | |
| T. melt. | decomp. 115 ° C |
| Chemical properties | |
| Solubility in water | 0.12 20 ; 2.3 70 g / 100 ml |
| Classification | |
| Reg. CAS number | 7782-91-4 |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| Reg. EC number | 231-970-5 |
| Chebi | |
| ChemSpider | |
Content
Getting
- Crystalline hydrate is formed by the action of dilute acids on concentrated solutions of alkali metal molybdates:
- Anhydrous acid is obtained by concentration of an aqueous solution of H 2 MoO 4 • H 2 O at 40-70 ° C.
Physical Properties
Molybdenum acid forms colorless (white) crystals, slightly soluble in water.
Forms crystalline hydrates of the composition H 2 MoO 4 • n H 2 O, where n = 1 and 2.
Chemical Properties
- Forms salts - molybdates :
Other connections
Molybdenum acids of a different composition are known:
- Dimolybdenum acid H 2 Mo 2 O 7 or 2MoO 3 • H 2 O
- tetramolybdic acid H 2 Mo 4 O 13 or 4MoO 3 • H 2 O
- mesomolybdic acid H 4 MoO 5 or MoO 3 • 2H 2 O
- orthomolybdic acid H 6 MoO 6 or MoO 3 • 3H 2 O
Literature
- Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1992. - T. 3. - 639 p. - ISBN 5-82270-039-8 .
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972. - T. 2. - 871 p.