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Chromium compounds are compounds containing the element chromium (Cr). Chromium is a member of group 6 of the transition metals . The +3 and +6 states occur most commonly within chromium compounds, followed by +2; charges of +1, +4 and +5 for chromium are rare, but do nevertheless occasionally exist.
Chromium(III) hydroxide is a gelatinous green inorganic compound with the chemical formula Cr(OH) 3. It is a polymer with an undefined structure and low solubility. It is amphoteric, dissolving in both strong alkalis and strong acids. [2] In alkali: Cr(OH) 3 + OH − → CrO − 2 + 2 H 2 O In acid: Cr(OH) 3 (OH 2) 3 + 3 H + → Cr(OH 2) 6 3+
10, and tetrachromates, Cr 4 O 2− 13. [2] All polyoxyanions of chromium(VI) have structures made up of tetrahedral CrO 4 units sharing corners. [3] The hydrogen chromate ion, HCrO 4 −, is a weak acid: HCrO − 4 ⇌ CrO 2− 4 + H +; pK a ≈ 5.9. It is also in equilibrium with the dichromate ion: 2 HCrO − 4 ⇌ Cr 2 O 2− 7 + H 2 O
The Parisians Pannetier and Binet first prepared the transparent hydrated form of Cr 2 O 3 in 1838 via a secret process, sold as a pigment. [6] It is derived from the mineral chromite, (Fe,Mg)Cr 2 O 4. The conversion of chromite to chromia proceeds via Na 2 Cr 2 O 7, which is reduced with sulfur at high temperatures: [7] Na 2 Cr 2 O 7 + S → ...
Hydrogen chloride – HCl; Hypochlorous acid – HOCl; Indium(I) chloride – InCl; Indium(III) chloride – InCl 3; Iodine monochloride – ICl; Iridium(III) chloride – IrCl 3; Iron(II) chloride – FeCl 2; Iron(III) chloride – FeCl 3; Lanthanum chloride – LaCl 3; Lead(II) chloride – PbCl 2; Lithium chloride – LiCl; Lithium ...
C 3 ClF 5 O: pentafluoropropionyl chloride: 422-59-3 C 3 ClN: chlorocyanoacetylene: 2003-31-8 C 3 Cl 3 NO 2: trichloroacetyl isocyanate: 3019-71-4 C 3 Cl 3 N 3: cyanuric chloride: 108-77-0 C 3 Cl 3 N 3 O 3: trichloroisocyanuric acid: 87-90-1 C 3 Cl 5 FO: fluoropentachloroacetone: 2378-08-7 C 3 Cl 6: hexachlorocyclopropane: 2065-35-2 C 3 CoNO 4 ...
HCl + CH 3 OH → [CH 3 OH 2] + + Cl −. Hydrogen chloride can protonate molecules or ions and can also serve as an acid-catalyst for chemical reactions where anhydrous (water-free) conditions are desired. Because of its acidic nature, hydrogen chloride is a corrosive substance, particularly in the presence of moisture.
Chromium(III) chloride (also called chromic chloride) is an inorganic chemical compound with the chemical formula Cr Cl 3.It forms several hydrates with the formula CrCl 3 ·nH 2 O, among which are hydrates where n can be 5 (chromium(III) chloride pentahydrate CrCl 3 ·5H 2 O) or 6 (chromium(III) chloride hexahydrate CrCl 3 ·6H 2 O).