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Silver dichromate information


Silver dichromate
Names
IUPAC name
Silver dichromate
Identifiers
CAS Number
  • 7784-02-3
3D model (JSmol)
  • Interactive image
ChemSpider
  • 8108122
ECHA InfoCard 100.029.131 Edit this at Wikidata
EC Number
  • 232-044-3
PubChem CID
  • 9932493
UNII
  • S8F2648XD9 checkY
CompTox Dashboard (EPA)
  • DTXSID80228462 Edit this at Wikidata
InChI
  • InChI=1S/2Cr.2Ag.7O/q;;2*+1;;;;;;2*-1
  • InChI=1/2Cr.2Ag.7O/q;;2*+1;;;;;;2*-1/rCr2O7.2Ag/c3-1(4,5)9-2(6,7)8;;/q-2;2*+1
SMILES
  • [Ag+].[Ag+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
Properties
Chemical formula
Ag2Cr2O7
Molar mass 431.76 g/mol
Appearance ruby red powder
Density 4.77 g/cm3
Solubility in water
Ksp = 2.0×10−7
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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 a charge of -2.

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Silver dichromate

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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...

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Potassium dichromate

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

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Silver

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potassium dichromate (K 2Cr 2O 7), and in the presence of potassium bromide (KBr). These compounds are used in photography to bleach silver images, converting...

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Liesegang rings

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of silver nitrate onto a thin layer of gel containing potassium dichromate. After a few hours, sharp concentric rings of insoluble silver dichromate formed...

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List of CAS numbers by chemical compound

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Ag2CrO4 silver chromate 7784–01–2 Ag2Cr2O7 silver dichromate 7784–02–3 Ag2F silver subfluoride 1302–01–8 Ag2MoO4 silver molybdate 13765–74–7 Ag2O silver oxide...

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Solubility table

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0.00052 Silver chlorite AgClO2 0.248 Silver chromate Ag2CrO4 0.002157 Silver cyanide AgCN 1.467×10−7 Silver dichromate Ag2Cr2O7 0.159 Silver fluoride...

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Glossary of chemical formulae

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Ag2Cr2O7 silver dichromate 7784-02-3 Ag2F silver subfluoride 1302-01-8 Ag2MoO4 silver molybdate 13765-74-7 Ag2O silver(I) oxide 20667-12-3 Ag2S silver sulfide...

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Chromic acid

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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...

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Gum printing

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making photographic reproductions without the use of silver halides. The process uses salts of dichromate in common with a number of other related processes...

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Sun printing

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

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Photographic emulsion

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

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Potassium chromate

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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 +...

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Carbon print

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

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List of photographic processes

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Gelatino-Bromide emulsions, 1875 Gelatin-silver process Gem tintype Gum bichromate Gum Bichromate Print Gum Dichromate Gum over platinum Gum printing = *Photogravure...

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Silver chromate

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potassium dichromate solution. This is followed by drying and immersion in a 2% aqueous silver nitrate solution. By the same reaction as above, silver chromate...

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Photographic processing

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popular bleach solutions use potassium dichromate (a hexavalent chromium) or permanganate. Both ferricyanide and dichromate are tightly regulated for sewer disposal...

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Chromate conversion coating

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immersion in a room-temperature solution consisting of 182 g/L sodium dichromate (Na2Cr2O7 · 2H2O) and 6 mL/L concentrated sulfuric acid. The chromate...

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Oil print process

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paper on which a thick gelatin layer has been sensitized to light using dichromate salts. After the paper is exposed to light through a negative, the gelatin...

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Bleach

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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...

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Alternative process

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Anthotype Caffenol Daguerreotype Gum bichromate and other Pigmented Dichromated Colloids which are used to directly generate a photographic print Platinum...

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Camillo Golgi

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entirety. He first treated the tissue with potassium dichromate to harden it, and then with silver nitrate. Under the microscope, the outline of the neuron...

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Chromium

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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...

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Thermometric titration

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titrimetry. Thermometric titrations of silver nitrate with halides and cyanide are all possible. The reaction of silver nitrate with chloride is strongly exothermic...

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Reversal film

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removed by bleaching with a solution of potassium permanganate or potassium dichromate in dilute sulfuric acid, which is removed by washing and a clearing bath...

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Firescale

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sterling and similar grades of silver, depletion silvering the piece, and for gold-copper alloys, a sodium dichromate pickle solution with a low percentage...

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Color of chemicals

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Chromium(III) hydroxide Cr(OH)63−   yellowish Monochromate CrO2− 4   Yellow Dichromate Cr 2O2− 7   Orange Manganese(II) Mn2+   Pale pink Manganese(III) Mn3+...

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Nitrogen

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

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