Beryllium sulphate

Procedure. Prepare a solution containing 10 jug of beryllium in 50 mL. (CARE Beryllium compounds are toxic.) Use beryllium sulphate, BeS04,4H20. To... 

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... 

Beryllium Basic Carbonate. Add a saturated ammonium carbonate solution dropwise to 4-5 ml of beryllium sulphate. Explain the precipitation of a substance and its dissolution in an excess amount of the reactant. Write the equations of the reactions. Boil the solution. Explain the appearance of a precipitate when the solution is boiled. What is its composition ... 

Beryllium sulphate (4H2O) [7787-56-6] M 177.1. Crystd from weak aqueous H2SO4. 

Beryllium Polyvanadate, 2Be0.3V205.IlH20, forms dark red, hygroscopic crystals which are obtained by the action of beryllium sulphate on barium hexavanadate.10... 

F. Vogel tried without success to make beryllium nitrite by the action of beryllium sulphate on barium nitrite. He found that in aq. soln. the precipitate is immediately hydrolyzed, nitrogen oxides are evolved, and only a small proportion of nitrogen remains. It might be added that many salts, unstable in aq. soln., have... 

Reactions of beryllium ions, Be2 To study these reactions use a 0- 1m solution of beryllium sulphate, BeS04.4H20. 

Beryllium sulphate (01m). Dissolve 17-7 g beryllium sulphate tetrahydrate, BeS04.4H20 in water and dilute to 1 litre. 

SYNS BERYLLIUM SULPHATE TETRAHYDRATE SULFURIC ACID, BERYLLIUM SALT (1 1), TETR. HYDRATE... 

Table 1 Enthalpies of formation of beryllium sulphate and its hydrates...

The characteristic features of hydrate structures of this type may be best illustrated by describing in detail one typical such compound and by then considering only briefly a number of others which have been studied. The structure which we select for discussion is that of beryllium sulphate tetrahydrate. 

Keshava N, Zhou G, Spruill M, Ensell M and Ong T (2001) Carcinogenic potential and genomic instability of beryllium sulphate in BALB/c-3T3 cells. Mol Cell Biochem 222 69-76. 

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. 

Beryllium Sulphates.—Six normal. sulphates of beryllium find place in chemical literature ... 

Anhydrous Beryllium Sulphate, BeSO. —Nilson and Petters-son (1880 9) prepared a product very close to the composition BeSOi by heating the dihydrate at 250 . The sulphate so prer pared had a specific gravity=2.443 and a specific heat=o.i978. Lcbeaii (1896 6, 1899 ii) prepared the anhydrous sulphate by the action of strong sulphuric add on the oxide and evaporation of the excess of acid. Parsons (1904 10) states that while... 

Beryllium Sulphate Dihydrate, BeS04.2Hj0, is prepared by drying the tetrahydrate at 100 and is stable in dry air below this temperature. Nilson and Pettersson (1880 6), Krass and Moraht (1890 7), Parsons (1904 5, 1904 10), Levi-Malvano (1905 7). It dissolves readily in water passing back into the tetrahydrate. 

Beryllium Sulphate Tetrahydrate, BeS0. 4H20.— The tetrahydrate was first prepared by. Berzelius, (1815 i) who considered it to be an acid salt. Awdejew (1842 2) first determined its true character and used the salt to determine the atomic weight of beryllium. It was also employed for this purpose by Weeren (1854 i), Klatzo (1869 i)> Nilson and Pettersson (1880 6) and Kriiss and Moraht (1890 7). Parsons (1904 5) showed that the sulphate lost water continuously over phosphoric anhydride and discarded it as a means of determining the atomic weight of the element. This salt of beryllium has been studied more than any other compound of the metal. 

Properties.—Beryllium sulphate tetrahydrate consists of colorless octahedral crystals belonging to the tetragonal system. According to Topsoe (1872 i) and Topsde and Christiansen (1873 9) the crystals are unaxial and optically negative. Observed iorms (on).(no) a c=i 0.9461. Mean indices of refraction C= 1.4374 0 = 1.4691... 

Beryllium Sulphate Heptahydrate.—Klatzo (1869 ) thought Ilf had produced a hydrate with seven molecules of water of crystallization. His work is unconfirmed and the conditions which he gives, would in themselves, seem to render its production improbable, if not impossible. Parsons (1904 10) states tli.-it tliis hydrate undoubtedly does not exist. It should be remembered also that Marignac (1873 i) found Klatzo s work to be incorrect in many particulars. 

Berylliitm Thiosalphite.—Factor (1901 5) claims to have produced the salt, BeSjOa.iiHjO, by the action of a solution of, < ium thiosulphate on a solution of beryllium sulphate. Some experiments by the author lead him to believe that this is incorrect for in his hands an adnuxture of these two solutions always precipitates sulphur and gives off sulphur dioxide as was to be expected. Marignac (1875 i) and Atterberg (1873 7) could not obtain the salt. 

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