Ammonium metatungstate is an inorganic compound whose molecular weight varies depending on the crystallization conditions and hydration state. Here are a few key points about the molecular weight of ammonium metatungstate:
Molecular weight of ammonium metatungstate in anhydrous state
In some sources, the molecular weight of ammonium metatungstate in anhydrous state (molecular formula may be (NH4)6H2W12O40) is given as 3060.46 g/mol.
Molecular weight of ammonium metatungstate in hydrated state
Another common form of ammonium metatungstate is hydrated ammonium metatungstate, which may have the molecular formula (NH4)10[H2W12O42]·4H2O. For this form, the molecular weight is calculated to be 2910.19 g/mol. This is obtained by adding the atomic weights of each element: that is, (10×14)+(12×184)+(42×16)+(4×2)+(10×1).
Other information: The molecular formula of ammonium metatungstate may also appear in other forms, such as (NH4)6H2W12O40·nH2O or (NH4)6H2W12O40·XH2O, where n and X represent different numbers of water molecules. These different hydration forms may result in slight changes in molecular weight.
In summary, the molecular weight of ammonium metatungstate depends on whether it is hydrated and the degree of hydration. The molecular weight of ammonium metatungstate in anhydrous state is about 3060.46 g/mol, while the molecular weight of a common hydrated form is about 2910.19 g/mol. In practical applications, the exact molecular weight needs to be determined based on the specific ammonium metatungstate product.
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