Chromic chloride

Chromium(IH) chloride, chromic chloride, CrClj. Violet solid (Cr plus CI2, hydrate plus SOCI2) only soluble in water in presence of Cr. Forms many complexes including the hydrates [Cr(H20)6]Cl3 - violet, [Cr(H20)jCl]Cl2,H20 - green, [Cr(H20)4Cl2]Cl,2H20 - green. 

Sihcone products dominate the pressure-sensitive adhesive release paper market, but other materials such as Quilon (E.I. du Pont de Nemours Co., Inc.), a Werner-type chromium complex, stearato chromic chloride [12768-56-8] are also used. Various base papers are used, including polyethylene-coated kraft as well as polymer substrates such as polyethylene or polyester film. Sihcone coatings that cross-link to form a film and also bond to the cellulose are used in various forms, such as solvent and solventless dispersions and emulsions. Technical requirements for the coated papers include good release, no contamination of the adhesive being protected, no blocking in roUs, good solvent holdout with respect to adhesives appHed from solvent, and good thermal and dimensional stabiUty (see Silicon COMPOUNDS, silicones). 

Chromium (III) tris-2,4-pentanedionate [21679-31-2] chromic chloride). See chromium (III) acetylacetonate on p. 412. 

Chrom-bleii n. lead chromate, -bleispat, m. (Min.) crocoite. -braun, n. chrome brown, -chlorid, n. chromic chloride. chromium(III) chloride, -chlorilr, n, chromous chloride, chromium(II) chloride, -druck, m. (Calico) chrome printing. 

Using the periodic table as a guide, predict which of the following compounds form ionic solutions in water silicon carbide, SiC magnesium bromide, MgBr2 carbon tetrabromide, CBr chromic chloride, CrCl3. 

Induced dissolution is also a well known phenomenon and frequently applied in chemical analysis. To dissolve platinum easily it was suggested by Ropp that the sample should be alloyed with silver or copper, the alloys being easily soluble even in dilute acids. Anhydrous chromic chloride, insoluble in water and dilute acids, becomes easily soluble by adding metallic magnesium or zinc to the dilute acid . In this case the chromium(III) compound is reduced to chro-mium(II), which will be oxidized by the solvent to water-soluble chromium(III)... 

Chromic chloride, molecular formula, properties, and uses, 6 563t Chromic chromate, molecular formula, properties, and uses, 6 56 It Chromic fluoborate, molecular formula, properties, and uses, 6 563t Chromic fluoride, molecular formula, properties, and uses, 6 563t Chromic hydroxy dichloride, molecular formula, properties, and uses, 6 563t Chromic nitrate, molecular formula, properties, and uses, 6 563t Chromic oxide... 

Zinc dust (10 g) is shaken vigorously with a solution of 0.8 g of mercuric chloride and 0.5 ml of concentrated hydrochloric acid in 10ml of water for 5 minutes. The supernatant liquid is decanted, 20 ml of water and 2 ml of concentrated hydrochloric acid is added to the residue, and 5 g of chromic chloride is added portionwise with swirling in a current of carbon dioxide. The dark blue solution is kept under carbon dioxide until used. 

Trivalent chromium compounds (Cr )(chromic compounds) including chromic oxide (Cr203), chromic sulfate (Ct2[S04]3), chromic chloride (CrCb), chromic potassium sulfate (KCr[S04]2), and chromite ore (FeOCdCr203). 

Synonyms chromic chloride chromium trichloride chromium sesquichloride. 

Chromic acetate (see Chromium and chromium compounds) Chromic chloride (see Chromium and chromium compounds) Chromic oxide see Chromium and chromium compounds) Chromic phosphate see Chromium and ehromium compounds) Chromite ore see Chromium and ehromium compounds) Chromium and chromium compounds see also Implants, surgical)... 

In the same way ehloro-pentaquo-ehromic sulphate, [Cr(H20)5Cl]S04, is isomeric with sulphato-pentaquo-chromic chloride, [Cr(IT20)5S04]Cl. 

Chromium has a maximum co-ordination number of six the chromium atom, therefore, may combine with, at most, six monovalent atoms or groups, over and above its ordinary valency value, with formation of a complex radicle. Hence chromic chloride is capable of associating with, or adding on, six molecules of ammonia with formation of the derivative, [Cr(NH3)8]Cl3. Ammonia may be replaced by a substituted ammonia group or some other basic group, such as alkyl amine, pyridine, or ethylenediamine. 

Hexammino-ehromic Chloride, [Cr(NH3)6]Cl3.H20, is produced by the addition of concentrated hydrochloric acid to a solution of the nitrate, or, better, by the decomposition of the mercury double salt, [Cr(NH3)6]Cl3.(HgCl2), with hydrogen sulphide, when a purer chloride is obtained.3 It is formed as one of the products of the action of liquid ammonia on anhydrous violet chromic chloride.4... 

The salt crystallises in large, efflorescent, yellow leaflets, which are soluble in water and decompose on treatment with concentrated hydrochloric acid, with formation of chloro-pentammino-chromic chloride, [Cr(NH3)5Cl]Cl2. 

Triethylenediamino-chromic Chloride, [Cr en3]Cl3.8 H20, is formed by adding gradually the theoretical quantity of triehloro-tri pyridino-chromium, [Crpy3Cl3], to ethylenediamine monohydrate on... 

Resolution of Triethylenediamino-chromic Iodide.—Triethyl-enediamino-chromic chloride in aqueous solution was mixed with sodium d-camphor nitronate, when the sparingly soluble d-triethylcnecli-... 

Triethylenediamino - chromic Iodide, [Cr en3]I3.H20, is obtained from the mother-liquor from the action of sodium d-camphor nitronate and racemic triethylenediamino-chromic chloride by adding sodium iodide, filtering off the precipitate of inactive [Cr en3]I3 formed, and adding solid sodium iodide to the filtrate when the 1-niodification separates. In appearance it resembles the d-salt, and has rotation ... 

Aquo-pentammino-chromic Chloride, [Cr(NH3)5H20]Cl3, is formed by filtering an aqueous solution of the corresponding base into dilute hydrochloric acid, or, together with chloro-pentanunino-chromic chloride, by precipitation of a concentrated aqueous solution of the base with concentrated acid. It crystallises as an orange-coloured salt, easily dissolves in water, and the neutral solution decomposes on heating. 

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