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Potassium dichromate, K 2 Cr 2 O 7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications. As with all hexavalent chromium compounds, it is acutely and chronically harmful to health.
Potassium chromate is the inorganic compound with the formula K 2 CrO 4. This yellow solid is the potassium salt of the chromate anion. It is a common laboratory chemical, whereas sodium chromate is important industrially.
The dichromate ion is a somewhat weaker base than the chromate ion: [5] ... Rare potassium chromate minerals and related compounds are found in the Atacama Desert.
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The chromic acid is usually made by acidifying (with sulfuric acid) a solution of potassium dichromate. The old name for potassium dichromate is potassium bichromate and the cell is often called a bichromate cell. [1] This type of cell is now only of historical interest.
Potassium compounds are those chemical compounds which contain the chemical element potassium. Subcategories. ... Potassium dichromate; Potassium dicyanoargentate;
Of these, potassium dichromate (K 2 Cr 2 O 7) is the most effective: it is relatively cheap, easy to purify, and can nearly completely oxidize almost all organic compounds. In these methods, a fixed volume with a known excess amount of the oxidant is added to a sample of the solution being analyzed.
Sun printing may also refer to a photographic process using potassium dichromate which produces a negative plate for conventional lithographic printing. The process uses a film of gelatine spread on a flat and rigid surface. This is coated with a dilute solution of potassium dichromate and dried in low light conditions.