The physical properties of ammonium metatungstate hydrate can be summarized as follows:
Appearance and color
Ammonium metatungstate hydrate usually appears as a white or slightly yellow crystalline powder.
Solubility
Ammonium metatungstate hydrate is readily soluble in water and also in ethanol, but insoluble in benzene.
Its solubility is generally between 0.2% and 0.4%, showing relatively low solubility.
Crystallizability
As a hydrate, ammonium metatungstate hydrate is capable of forming crystals under appropriate conditions, which is an important feature of its physical properties.
Other physical constants
Specific data on the physical constants of ammonium metatungstate hydrate, such as density, melting point, boiling point, refractive index, etc., are not available at this time due to limited information. However, since it is a crystalline powder, usually the melting point of such substances is high, while the boiling point depends on its degree of dehydration.
pH
Aqueous solutions of ammonium metatungstate hydrate are weakly acidic, with pH values usually ranging from 3.0 to 4.5.
Stability
Ammonium metatungstate hydrate is relatively stable at room temperature and normal pressure, but it is easy to lose crystalline water and even ammonia to generate tungsten oxide at high temperature, showing its certain characteristics in thermal stability.
As a white or slightly yellow crystalline powder, ammonium metatungstate hydrate has good solubility and crystallinity, the aqueous solution is weakly acidic, and may show thermal instability at high temperature.
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