Chromate salts contain the chromate anion, CrO2− 4. Dichromate salts contain the dichromate anion, Cr 2O2− 7. They are oxyanions of chromium in the +6...
13 KB (1,230 words) - 08:43, 4 July 2024
Potassium dichromate, K2Cr2O7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications...
20 KB (2,037 words) - 15:25, 21 March 2024
Sodium dichromate is the inorganic compound with the formula Na2Cr2O7. However, the salt is usually handled as its dihydrate Na2Cr2O7·2H2O. Virtually all...
9 KB (778 words) - 13:55, 24 January 2024
Ammonium dichromate is an inorganic compound with the formula (NH4)2Cr2O7. In this compound, as in all chromates and dichromates, chromium is in a +6...
12 KB (1,057 words) - 04:45, 24 April 2023
potassium dichromate is used for COD determination, although for samples with COD below 50 mg/L, a lower concentration of potassium dichromate is preferred...
11 KB (1,528 words) - 19:07, 7 August 2024
Silver dichromate is a chemical compound with the formula Ag2Cr2O7. It is insoluble in water and decomposes when treated with hot water. Its anion has...
3 KB (175 words) - 22:26, 19 August 2024
trioxide, pyridinium chlorochromate (PCC), and chromate/dichromate compounds such as Sodium dichromate (Na2Cr2O7) Permanganate compounds such as potassium...
9 KB (875 words) - 10:33, 12 May 2024
Cornforth reagent (redirect from Pyridinium dichromate)
The Cornforth reagent (pyridinium dichromate or PDC) is a pyridinium salt of dichromate with the chemical formula [C5H5NH]2[Cr2O7]. This compound is named...
8 KB (766 words) - 13:23, 24 May 2024
solution formed by the addition of sulfuric acid to aqueous solutions of dichromate. It consists at least in part of chromium trioxide. The term chromic acid...
15 KB (1,357 words) - 22:57, 23 February 2024
reproductions without the use of silver halides. The process uses salts of dichromate in common with a number of other related processes such as sun printing...
8 KB (1,046 words) - 09:16, 19 May 2024
Sun printing (section Potassium dichromate)
Sun printing may also refer to a photographic process using potassium dichromate which produces a negative plate for conventional lithographic printing...
4 KB (506 words) - 20:20, 25 March 2024
Chromic acid cell (redirect from Dichromate cell)
acidifying (with sulfuric acid) a solution of potassium dichromate. The old name for potassium dichromate is potassium bichromate and the cell is often called...
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acid into the dichromate. 4 FeCr2O4 + 8 Na2CO3 + 7 O2 → 8 Na2CrO4 + 2 Fe2O3 + 8 CO2 2 Na2CrO4 + H2SO4 → Na2Cr2O7 + Na2SO4 + H2O The dichromate is converted...
109 KB (11,825 words) - 23:25, 21 August 2024
A homeopathic preparation made from potassium dichromate, a chemical compound well known for its toxic and carcinogenic properties...
99 KB (10,756 words) - 12:38, 14 July 2024
pigment—originally carbon black, from which the name derives) is bathed in a potassium dichromate sensitizing solution, dried, then exposed to strong ultraviolet light...
16 KB (1,396 words) - 08:42, 24 May 2024
structures. The prefix pyro is also denoted by the prefix di- . For example, dichromate ion is a dimer. The following tables give additional examples of commonly...
11 KB (773 words) - 14:09, 17 August 2024
via the formation of hexavalent chromium, specifically the salt sodium dichromate. Sodium chromate is converted into other hexavalent chromium compounds...
66 KB (7,080 words) - 19:36, 1 June 2024
sulfuric acid containing potassium dichromate. It can also be obtained by the thermal decomposition of ammonium dichromate. 3(NH4)2Cr2O7 → 2N2 + 9H2O + 3Cr2O3...
105 KB (12,223 words) - 08:00, 14 August 2024
sulfuric acid and water in a roughly 1:1:2 ratio, then adding potassium dichromate. Mauveine A (C26H23N+4X−) incorporates 2 molecules of aniline, one of...
11 KB (1,123 words) - 18:00, 13 May 2024
Subsequent to its formation, the chromate salt is converted to sodium dichromate, the precursor to most chromium compounds and materials. The industrial...
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achieved by impregnating aldehyde fixed nervous tissue with potassium dichromate and silver nitrate. Cells thus stained are filled by microcrystallization...
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tetrahedral CrO42− center in β-K2CrO4. It is prepared by treating potassium dichromate with potassium hydroxide: K 2 Cr 2 O 7 ( aq ) + 2 KOH ⟶ 2 K 2 CrO 4 +...
6 KB (517 words) - 20:29, 24 April 2024
A thermometric titration is one of a number of instrumental titration techniques where endpoints can be located accurately and precisely without a subjective...
35 KB (4,524 words) - 12:52, 26 August 2024
Oxoanions (Polyatomic ions) Carbonate CO2−3 Chlorate ClO−3 Chromate CrO2−4 Dichromate Cr2O2−7 Dihydrogen phosphate H2PO−4 Hydrogen carbonate HCO−3 bicarbonate...
30 KB (3,084 words) - 14:31, 26 August 2024
layer of gel containing potassium dichromate. After a few hours, sharp concentric rings of insoluble silver dichromate formed. It has aroused the curiosity...
12 KB (1,594 words) - 14:10, 24 July 2024
Titrant Iodometry Iodine (I2) Bromatometry Bromine (Br2) Cerimetry Cerium(IV) salts Permanganometry Potassium permanganate Dichrometry Potassium dichromate...
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cases, the bleach composition is typically an acid solution of potassium dichromate. A Risk Assessment Report (RAR) conducted by the European Union on sodium...
36 KB (3,886 words) - 04:08, 15 August 2024
chloride can be prepared by the reaction of potassium chromate or potassium dichromate with hydrogen chloride in the presence of sulfuric acid, followed by distillation...
7 KB (432 words) - 22:38, 24 July 2024
such as chromium nitrate, or by the exothermic decomposition of ammonium dichromate. (NH 4) 2Cr 2O 7 → Cr 2O 3 + N 2 + 4 H 2O The reaction has a low ignition...
9 KB (840 words) - 05:53, 3 July 2024
photographic context. Gelatin or gum arabic layers sensitized with dichromate used in the dichromated colloid processes carbon and gum bichromate are sometimes...
5 KB (482 words) - 09:56, 1 April 2024