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...

Potassium dichromate, K2Cr2O7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications...

Sodium dichromate is the inorganic compound with the formula Na2Cr2O7. However, the salt is usually handled as its dihydrate Na2Cr2O7·2H2O. Virtually all...

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...

potassium dichromate is used for COD determination, although for samples with COD below 50 mg/L, a lower concentration of potassium dichromate is preferred...

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...

trioxide, pyridinium chlorochromate (PCC), and chromate/dichromate compounds such as Sodium dichromate (Na2Cr2O7) Permanganate compounds such as potassium...

The Cornforth reagent (pyridinium dichromate or PDC) is a pyridinium salt of dichromate with the chemical formula [C5H5NH]2[Cr2O7]. This compound is named...

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...

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...

Sun printing may also refer to a photographic process using potassium dichromate which produces a negative plate for conventional lithographic printing...

acidifying (with sulfuric acid) a solution of potassium dichromate. The old name for potassium dichromate is potassium bichromate and the cell is often called...

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...

pigment—originally carbon black, from which the name derives) is bathed in a potassium dichromate sensitizing solution, dried, then exposed to strong ultraviolet light...

A homeopathic preparation made from potassium dichromate, a chemical compound well known for its toxic and carcinogenic properties...

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...

via the formation of hexavalent chromium, specifically the salt sodium dichromate. Sodium chromate is converted into other hexavalent chromium compounds...

sulfuric acid containing potassium dichromate. It can also be obtained by the thermal decomposition of ammonium dichromate. 3(NH4)2Cr2O7 → 2N2 + 9H2O + 3Cr2O3...

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...

achieved by impregnating aldehyde fixed nervous tissue with potassium dichromate and silver nitrate. Cells thus stained are filled by microcrystallization...

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 +...

Subsequent to its formation, the chromate salt is converted to sodium dichromate, the precursor to most chromium compounds and materials. The industrial...

A thermometric titration is one of a number of instrumental titration techniques where endpoints can be located accurately and precisely without a subjective...

Oxoanions (Polyatomic ions) Carbonate CO2−3 Chlorate ClO−3 Chromate CrO2−4 Dichromate Cr2O2−7 Dihydrogen phosphate H2PO−4 Hydrogen carbonate HCO−3 bicarbonate...

layer of gel containing potassium dichromate. After a few hours, sharp concentric rings of insoluble silver dichromate formed. It has aroused the curiosity...

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...

Titrant Iodometry Iodine (I2) Bromatometry Bromine (Br2) Cerimetry Cerium(IV) salts Permanganometry Potassium permanganate Dichrometry Potassium dichromate...

cases, the bleach composition is typically an acid solution of potassium dichromate. A Risk Assessment Report (RAR) conducted by the European Union on sodium...

photographic context. Gelatin or gum arabic layers sensitized with dichromate used in the dichromated colloid processes carbon and gum bichromate are sometimes...

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...