Ferri-sulphates

A well-defined series of complex alkali salts of ferric sulphite has been prepared,5 analogous to the ferri-sulphate derivatives of ferric sulphate (see p. 162), but containing one S04 radicle. 

Phosphate must be applied as fertilizer to the soil. Ideally it is added in quantities sufficient to guarantee optimal yields, but not in excess in order to avoid P transportation into other compartments of the ecosystem. The amount added should be based on an accurate estimation of the plant-available fraction of P already present in a soil.This is an old and difficult task and a large number of extraction methods have been used since intensive land use was practised. Recently methods have been worked out in which a strip of filter paper impregnated with an Fe oxide (2-line ferri-hydrite) is dipped into a soil suspension and the amount of P adsorbed by the paper is taken as being plant-available (Sissingh,1988 Van der Zee et ah, 1987 Sharpley, 1993 Sharpley et ah,1994 Kuo and Jellum, 1994 Myers et ah 1997). Anion and cation resins extracted more P from four heavily fertilized soils than from goethite (Delgado Torrent, 2000). Other oxyanions adsorbed by soil Fe oxides are silicate, arsenate, chromate, selenite ( ) and sulphate. Adsorption of sulphate led to a release of OH ions and was substantially lowered once the Fe oxides were selectively removed (Fig.16.17). 

The electrical conductivities of soln. of a great many compounds in liquid hydrogen halides have been measured by E. H. Archibald and D. McIntosh. The conductivity is raised considerably by phosphoryl chloride. Sodium sodium sulphide, borate, phosphate, nitrate, thiosulphate, and arsenate chromic anhydride potassium nitrate, hydroxide, chromate, sulphide, bisulphate, and ferro- and ferri- cyanide ammonium fluoride and carbonate j rubidium and caesium chloride magnesium sulphate calcium fluoride ... 

Ferrous Salt — Dissolve 1 gm. of ferric ammonium sulphate in 20 cc. of water, add 1 cc. of hydrochloric acid and 1 drop of a freshly prepared solution of potassium ferri-cyanide. Neither a green nor a blue color should develop. 

The hydrothermal synthesis of the faujasites was carried out at 373 K in stainless steel autoclaves in static condition. The faujasites were synthesised using seeds of an aluminium ferri-silicate gel. 16 g of the homogeneous seed slurry (aged for 24 hrs at room temperature) was added to an aqueous gel mixture containing sodium silicate (86.8 g) sodium aluminate (5.6 g) aluminium sulphate (7.5 g) and ferric... 

Potassium ferri-sulphite, KFe(S03)S04, is prepared by the action of potassium hydrogen sulphite upon ferric ammonium alum. It crystallises in slender needles, which are sparingly soluble in cold water. With hot water, ferrous and potassium sulphates pass into solution, leaving an insoluble yellow residue. 

When barium chloride is added to sulphuric acid or soluble sulphate solutions containing dissolved ferric salts, the precipitated barium sulphate is contaminated with iron. This has been variously attributed to adsorption of feme compounds, and to the formation of solid solutions of ferric salts and barium sulphate. Smith, however, does not regard either of these explanations as satisfactory, and attributes the phenomenon to the formation of insoluble barium ferri-disulphate, Ba[Fe(S04)2]2.irH20, which is admixed with barium sulphate.7... 

On addition of concentrated sulphuric acid to a solution of the alum a white precipitate is obtained which contains ferric and ammonium sulphates in some uncertain state of combination. The precipitate when dry is stable in air, slowly soluble in cold water, but readily soluble in hot hydrochloric acid, and is possibly an ammonium salt of ferri-sulphuric acid (see p. 162). 

Iron and Sulphur—Subsulphides of Iron—Ferrous Sulphide—Ferric Sulphide-Double Sulphides—Iron Pyrites—Marcasite—Magnetic Pyrites—Ferrous Sulphite—Ferri-sulphites—Ferrous Sulphate—Double Sulphates—Fern-sulphates—Alums—Anndo-sulphonates, Thiosulphate, Disulphate, and Thionates of Iron. 

Ferri sulphas. Sulphate of iron. Ferri sulphas. 

Ferric Sulphate W f[E A West] Ferric Sulphate WB f[E A West] Ferri-Floc t[Boliden Intertrade] I PC 60501[Baker Petrol ite http //WWW. bakerpetroiite. com] Kern -Clean [Kemiron http //www.kemiron.com]... 

Ferric sulfate Ferric Sulphate HAW Ferric Sulphate W Ferric Sulphate WB Ferri-Floc IPC 6050 Kem-Clean Phos-Free 10028-24-7... 

Five c.c. of the alcoholic solution of mustard oil are mixed in a graduated tube of 100 0.0. capacity with 10 c.c. of solution of ammonia and 50 c.c. >deci-normal silver nitrate solution, and the whole is immediately heated for one hour on a briskly boiling water-bath under a reflux condenser. After cooling to 15 , and filling up to the mark with distilled water, adding nitric acid until a feeble acid reaction takes place, and 1 c.c. ferri-ammonium sulphate solution, deci-normal ammonium thiocyanate solution should be added to the clear filtrate, until a red coloration is produced. 

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