Molybdate of ammonia is an important reagent in the determination of phosphates, the manufacture of which compound is the chief purpose to which molybdenum is applied.
Next put in the solution of ammonium molybdate solution in the proportion of about 50 c.
The solution containing the molybdate is neutralised and treated with an excess of mercurous nitrate.
The separation of the phosphoric acid from the calcium must first be accomplished by precipitation in the form of ammonium phosphomolybdate in nitric acid solution, using ammonium molybdateas the precipitant.
There are several volumetric methods for assaying lead ores, but the best known is that based on the precipitation of lead by ammoniummolybdate in an acetic acid solution.
The molybdatesolution should be of such a strength that 1 cc.
As long as the solution contains lead, the addition of the molybdate solution causes a precipitation of white lead molybdate.
A clear malachite green colour, when dried, is produced from molybdate of soda and potash-chrome-alum, or from the molybdate and alum with ammonia.
Like the chromemolybdate it would be superfluous as a pigment.
A more eligible preparation is the molybdate of baryta, produced by mixing solutions of molybdate of potash and acetate of baryta.
There is likewise obtainable a copper molybdate, by adding neutral molybdate of soda in excess to sulphate of copper.
It is formed when a solution of bichloride of molybdenum is poured into a saturated, or nearly saturated, solution of molybdate of ammonia.
A blue precipitate falls, which is a molybdate of molybdic oxide, hydrated, and abundantly soluble in water.
Molybdate of ammonium is the salt principally used in dyeing.
A solution of molybdate of ammonia in excess of nitric acid forms a valuable agent as a test for phosphates, with which it gives a beautiful yellow precipitate (phospho-molybdate of ammonia).
The filtrate is then tested for phosphates, by means of molybdate of ammonia (vide: detection of phosphoric acid, p.
The fluid acquires a yellow coloration when boiled with a solution of molybdate of ammonia.
Preparation; Molybdate of ammonia is precipitated by phosphate of soda; and the well-washed yellow precipitate is suspended in water and warmed with carbonate of soda, until it is entirely dissolved.
Froehde's reagent= is made by dissolving 1 part of sodic molybdate in 10 parts of strong sulphuric acid; it strikes distinctive colours with many alkaloids.
Like them they give with acid molybdate solution a yellow, with magnesium sulphate a white crystalline, precipitate.
To a warm solution of molybdate of ammonia acidified with nitric acid, phosphate of soda is added as long as any yellow precipitate is obtained.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "molybdate" in a variety of sentences. We hope that you will now be able to make sentences using this word.
