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- Chromium (III) Sulfate is used as an electrolyte for obtaining chromium metal, for chrome plating on other metals, as a mordant in tanning leather and in imparting green colour to varnishes, paints, ceramic glazes and ink.
testbook.com/chemistry-formulas/chromium-iii-sulfate-formulaChromium (III) Sulfate - Formula, Properties, Structure and Uses
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Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr 2 (SO 4) 3. x(H 2 O), where x can range from 0 to 18. Additionally, ill-defined but commercially important "basic chromium sulfates" are known.
Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr 2 (SO 4) 3. x(H 2 O), where x can range from 0 to 18. Additionally, ill-defined but commercially important "basic chromium sulfates" are known.
IDENTIFICATION AND USE: Chromium (III) sulfate forms red-brown hexagonal crystals. It is used in solubilization of gelatin; in catalyst preparation; as mordant in textile industry; in tanning of leather; in chrome plating; in manufacture of chromium , chromic trioxide and chromium alloys; to improve dispersibility of vinyl polymers in water ...
Chromium III Sulfate is a blue-gray solid that is soluble in water and turns green in colour upon heating. Here, in the article, learn the chromium III sulfate formula and its properties and uses.
- Blue-gray solid
- 90 °C
- Cr 2 (SO 4) 3
- Chromium (III) Sulfate
- Properties
- Availability
- Preparation
- Projects
- Handling
- References
Chemical
Solutions of chromium(III) sulfate turn from blue to green upon heating, indicating the formation of a less reactive "sulfato-complex" that may take days or weeks to revert. Freshly prepared chromium sulfate often contains traces of this coloration, with some samples even appearing green rather than blue, but is otherwise usable. A solution of both chromium(III) sulfate and potassium sulfate will yield crystals of chrome alumon partial evaporation. Treatment of chromium(III) sulfate with base...
Physical
Chromium(III) sulfate most often appears as a blue-grey or violet-grey amorphous solid. Recently prepared samples or those that have been subjected to heat may contain a deep green-colored sulfato complex and are hygroscopic as a result. Purer samples can be dried to form a lighter-colored powder. Chromium(III) sulfate is readily soluble in water and some lower alcohols.
Chromium sulfate, for the most part, can only be purchased from online suppliers. Its use as a tanning chemical has largely been superseded by chrome alum and other agents.
The Jones oxidation, which uses a solution of potassium dichromate or sodium dichromateacidified with sulfuric acid to oxidize alcohols, produces chromium(III) sulfate as a byproduct, along with sodium or potassium sulfate. If the temperature of the reaction is kept low enough, the presence of chromium(III) sulfate will be indicated by a blue or bl...
Grow crystals of chrome alum, a double saltCompound collecting (colored salts)Make chromates and dichromatesSafety
Contact with solutions of chromium(III) sulfate or inhalation of particles may cause irritation, but overall this compound is relatively non-toxic.
Storage
Chromium(III) sulfate is relatively stable and has low reactivity, but should be kept away from temperatures greater than 40 °C when in the presence of moisture to avoid complex formation. A clean plastic bottle is a good storage bottle.
Disposal
Chromium(III) can be harmful to marine life, so water-soluble compounds of trivalent chromium should be precipitated as chromium(III) hydroxide before being disposed of in the trash. You can also recycle the chromium ions.
Relevant Sciencemadness threads
1. Chromium alum crystallisation problem 2. Chromium Sulphate from Stainless Steel
Jun 30, 2023 · Chrome alum is known as a double salt. If you mix solutions of potassium sulfate and chromium(III) sulfate so that their molar concentrations are the same, the solution behaves just like you would expect of such a mixture. It gives the reactions of chromium(III) ions, of potassium ions, and of sulfate ions.
Chromium(II) sulfate is an inorganic compound with the chemical formula Cr S O 4. It often comes as hydrates CrSO 4 ·nH 2 O. Several hydrated salts are known. The pentahydrate CrSO 4 ·5H 2 O is a blue solid that dissolves readily in water. Solutions of chromium(II) are easily oxidized by air to Cr(III) species.
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