Most molybdenum compounds have low solubility in water, but when molybdenum-bearing minerals contact oxygen and water, the resulting molybdate ion is quite soluble.
32.
The heptamolybdate cluster is so stable that clusters with between 2 and 6 molybdate units have not been detected even though they must be formed as intermediates.
33.
Due to the complexity of silica chemistry, the form of silica measured is defined by the photometric ( colorimetric ) method as molybdate-reactive silica.
34.
Those forms of silica that are molybdate-reactive include dissolved simple silicates, monomeric silica and silicic acid, and an undetermined fraction of polymeric silica.
35.
It has a residence time within the oceans of around 8 x 10 5 years and is generally present as the molybdate anion ( MoO 4 2 " ).
36.
The selective blue coloration develops with exposure to air ( oxygen ) and can be fixed by immersion of the stained specimen in an aqueous solution of ammonium molybdate.
37.
This conversion is a step in the preparation of catalysts for hydrodesulfurization wherein alumina impregnated with molybdate salts are converted to molybdenum disulfide by the action of hydrogen sulfide.
38.
The same year, he suggested use of ammonium molybdate for detection of arsenic in criminal medicine and in mineral analysis, such as indicating traces of arsenic in antimony.
39.
Most molybdenum compounds have low solubility in water, but the molybdate ion MoO 4 2 " is soluble and forms when molybdenum-containing minerals are in contact with oxygen and water.
40.
The discrete molybdenum oxoanions range in size from the simplest, found in potassium molybdate up to extremely large structures found in isopoly-molybdenum blues that contain for example 154 Mo atoms.
