Beryllium hydroxide sulphate

Preparation and Properties of Beryllium Hydroxide. Add a 10% ammonia solution dropwise to 4-5 ml of a 3% beryllium sulphate solution up to the complete formation of a precipitate. See how beryllium hydroxide reacts with 10% solutions of sodium hydroxide (use a minimum amount of the alkali) and acids. Boil the alkaline... 

How can you explain the fact that when an aqueous solution of an alkali metal beryllate is heated beryllium hydroxide precipitates, while when an aqueous solution of beryllium chloride or sulphate is heated no beryllium hydroxide precipitate forms ... 

Beryllium Trinitride.— Attempts to make the trinitride (Cuititis and Rissom, 1898 12) by the action of a solution of beryllium sulphate on barium trinitride failed, as it immediately broke down to beryllium hydroxide and hydronitric acid. 

It is shown that a solution of beryllium hydroxide in a solution of beryllium sulphate raises the freezing point of the latter and lowers its conductivity. The solutions obtained are not colloidal nor does the beryllium enter into a complex anion as is shown to be the case when a berylonate is present. 

In Fig. 9.13, the heat treatments are necessary to improve the efficiency of the sulphation step. The latter can be engineered in several alternative types of plant. Alternatives are available for the subsequent steps to pure oxide, but usually based upon precipitation and crystallization, as is the one shown in Fig. 9.13. The precipitation of beryllium hydroxide by boiling an alkaline solution of sodium beryllate, is a particularly valuable purification step, and is also used in Fig. 9.14. Chlorination of oxide mixed with carbon is a standard type of operation as used for the preparation of chloride intermediates of other metals. Molten salt electrolysis is one of the two alternative commercial routes to pure beryllium metal, the other being shown in Fig. 9.14. 

Preparation.—ITie oxide is prepared by heating the nitrate, sulphate, oxalate, hydroxide, basic carbonate or other salt of beryllium containing a volatile acid radical, and even the chloride, bromide and iodide yield practically all of their metal as oxide when evaporated from solution and heated. By evapwat-ing to dryness a mixed solution of beryllium chloride and ammonium chloride and heating in air, an oxide so light and feathery IS produced that it is difficult to retain it in the containing vessel. 

Made a study of the oxalates of licrylliiim in the same manner as the previous work, (KJ04, 10) on the sulphate and concludes that an acid oxalate does not exist and the oxalates of Iwryllium alone are the mono and trihydrates. Further that all of the so-called basic oxalates are in reality solid solutions approaching the hydroxide in composition. Give a list and general discussion of basic beryllium comjxmnds and state their belief that no definite basic compounds claimed to have been formed in presence of water have any real exist-... 

Freezing-point determinations, on both dilute and concentrated solutions, show tliat, per mol of SO any increase in basic ratio over the normal salt raises the freezing-point. The osmotic effect of the sulphate is, therefore, always decreased by dissolving in it its own hydroxide. The electrical conductivity of the basic solutions is less than that of normal solutions containing the same amount of SO,. Migration experiments show that beryllium forms no part of the anion. The basic solutions are not precipitated by crystalloids but on dialysis hydroxide is left on the membrane, and the dialyzed solution has a lower basic ratio. 

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