The molecular formula of Ammonium metatungstate hydrate can be expressed as (NH₄)₆H₂W₁₂O₄₀-xH₂O, where x denotes the number of water molecules, and this number may vary.
The following is a detailed explanation of this molecular formula:
– (NH₄)₆: indicates six ammonium ions (NH₄⁺).
– H₂: indicates two hydrogen atoms.
– W₁₂: indicates twelve tungsten atoms.
– O₄₀: indicates forty oxygen atoms.
-xH₂O: denotes a water molecule bound to ammonium metatungstate, where x is a variable number indicating the number of water molecules.
The molecular weight of ammonium metatungstate hydrate can vary depending on the number of water molecules it has. For example, in some sources the molecular weight is given as 2956.30, which may correspond to a hydrate with a particular x value. However, since the value of x may vary, the actual molecular weight may also vary.
In addition, ammonium metatungstate hydrate is a white crystalline powder or a slightly yellowish chemical which is soluble in water and is used in the manufacture of tungsten metal, alloy steel, fireproof fabrics, etc. It is also the main raw material for tungsten-based catalysts in oil refineries. When used and stored, attention should be paid to the environmental and health risks it may pose.
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