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Potassium bichromate

Chemical Designations - Synonyms Potassium bichromate. Bichromate Chemical Formula Observable Characteristics - Physical State (as normally shipped) Solid Color. Orange-red Odor Odorless. [Pg.325]

If-Phenylenediamine, when warmed with dilute sulphuric acid and potassium bichromate or lead peroxide, gives the odour of quinone (p.-iqa). After warming and cooling, extract with ether. The ethereal solution has a yellow colour. Decant the ether extract on to a watch-glass and leave it to evapoiate in the air. A deposit of microscopic yellow crystals remains. See Appendix., p. 286. [Pg.173]

To prepare heliotropin from isosafrol (which results from the isomerisation of safrol with alkalis), 5 parts of isosafrol are treated with a solution of 25 parts of potassium bichromate, 38 parts of cioncentrated sulphuric acid, and 80 parts of water. The reaction product is steam distilled and the distillate is extracted with ether, and the heliotropin obtained is purihed by means of alkaline bisulphite in the usual manner. [Pg.206]

The largest solubility isotope effects are found for sparingly soluble salts. For example, lead chloride and potassium bichromate are 36% and 33.5% more soluble in H20 than D20 at 298.15 and 278.15 K, respectively. For the more soluble salts, NaCl and KC1, the values are 6.4% and 9.0%. Interestingly LiF and LiCl.aq have inverse effects of 13% and 2%, respectively. Recall that lithium salts are commonly designated as structure makers . Almost all other electrolytes are structure breakers . [Pg.180]

National Toxicology Program Final Report on the Reproductive Toxicity of Potassium Bichromate (Hexavalent) (CAS No 7778-50-9) Administered in Diet to BALB/c Mice. National Institutes of Environmental Health Sciences, NTIS no PB97-1444919, 1997... [Pg.175]

Hawkins Brothers. Patented in 1896 in England, a mixture of the following approximate composition KC103 60 to 64,sugar 30 to 32, wood flour or soot 2 to 4,potassium bichromate 2 to 8% Refs 1) Daniel (1902), 370 2) Giua, Trattato 6, (1959), 391... [Pg.14]

Potassium bichromate. Antimony sulfide Potassium permanganate. Powdered sugar Barium chlorate, Paraffln wax Potassium perchlorate. Cane sugar Sodium nitrate. Sulfur Sodium peroxide. Sulfur Sodium chlorite. Aluminum powder Magnesium chlorate. Aluminum powder Guanidine nitrate. Antimony powder Ammonium nitrate. Gasoline... [Pg.332]

Chlorine, derived from a mixture of hydrochloric acid and potassium bichromate in a 1500 c.c. flask, is washed in water, and then led into a 500 c.c. flask containing mercuric oxide covered with five times its volume of water. The flask is fitted with a stopper carrying an inlet tube reaching nearly to the bottom, and an exit tube connected with a fume chamber. This flask stands in water cooled with ice. When the reaction is nearly completed, the mercuric oxide disappears. The flask is agitated periodically. The soln. of hypochlorous acid mixed with mercuric oxide, etc., is distilled the receiver should be connected with the fume chamber. [Pg.245]

To summarize the production of sodium hypochlorite is favoured by (i) Neutral cone. soln. of sodium chloride (ii) Low temp. (iii) High anodic current density (iv) The presence of potassium bichromate and (v) An adequate circulation of the electrolyte. G. E. Cullen and R. S. Hubbard have studied the best... [Pg.279]

Prepare a chromium mixture in a large porcelain mortar. Triturate about 10 g of potassium bichromate, wet it with 3-5 ml of water, and add 100 ml of a 96% sulphuric acid solution while stirring. Transfer the settled solution into a thick-walled bottle with a ground-glass stopper. [Pg.22]

The most extensive investigation was carried out by Guiochon and L. Jacqu6 [30] and Guiochon [17, 31]. They used the same thermogravimetric method as in their former experiments, and examined the influence of chromium oxide (0.3-8%), potassium bichromate (0.1-3%), chromium nitrate (1-5%) and also pure chromium (0.033-5.5%) [30]. [Pg.457]

Othmer 3(1949) - not found 3)Ullmann 5(1953) not found 4)Sax(1957), 819-20 5)Lange(l96l), 262-3 6)CondChemDict(l961) - not found Potassium Dichromate(Potassium Bichromate or Red Potassium Chromate), K2Cr20 , mw 294.22 red trie crysts mp-when heated to ca... [Pg.67]

Method I. (from p-xylene).—20 gms. (1 mol.) of p-xylene are refluxed for 24 hours with 80 gms. (excess) of sodium or potassium bichromate and 250 gms. of 50% sulphuric acid. The unoxidised hydrocarbon is removed by distillation in steam, and the cooled solution filtered. The precipitate is purified by reprecipitation with acid from its dilute solution in sodium carbonate or caustic alkali. [Pg.246]

From Alcohol.—To 32 gms. potassium carbonate dissolved in 80 gms. water 16 gms. 95% alcohol are added, and the solution heated to 70°. 32 gms. powdered iodine are added gradually with stirring. Iodoform gradually separates out, and when the solution has become completely decolorised, is filtered off, washed with water, and dried at ordinary temperature. A further yield is obtained by adding 2—3 gms. potassium bichromate and 16—24 gms. cone, hydrochloric acid, neutralising and adding 32 gms. potassium carbonate, 16 gms. 95% alcohol and 6 gms. iodine, and carrying out as before. [Pg.435]

In some cases, especially with almost colourless liquids, the zones of the field of vision exhibit somewhat different colours, which prevents accurate readings being obtained. This inconvenience is avoided by introducing a suitable plate of potassium bichromate into the eye-piece or by interposing between the lamp and the saccharimeter a glass cell with parallel faces (Landolt s so-called ray-filter) containing an aqueous solution of this salt1 by this means the more refractive rays are absorbed and the field assumes a uniform yellow tint. [Pg.103]

The solution in concentrated sulphuric acid gives a blue colour with a drop of potassium bichromate solution. [Pg.268]


See other pages where Potassium bichromate is mentioned: [Pg.803]    [Pg.803]    [Pg.171]    [Pg.398]    [Pg.241]    [Pg.64]    [Pg.116]    [Pg.169]    [Pg.192]    [Pg.259]    [Pg.302]    [Pg.183]    [Pg.112]    [Pg.113]    [Pg.33]    [Pg.34]    [Pg.304]    [Pg.305]    [Pg.751]    [Pg.140]    [Pg.107]    [Pg.171]    [Pg.278]    [Pg.288]    [Pg.320]    [Pg.64]   
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Bichromates

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