Search results
Results from the WOW.Com Content Network
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.
3 O 2− 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
2 yellow Metavanadate: VO − 3: colorless Orthovanadate: VO 3− 4: colorless Chromium(II) Cr 2+ bright blue Chromium(III) Cr 3+ blue-green-grey Chromium(III) hydroxide: Cr(OH) 6 3− yellowish Monochromate: CrO 2− 4 yellow Dichromate: Cr 2 O 2− 7 orange Manganese(II) Mn 2+ pale pink Manganese(III) Mn 3+ crimson Manganate(V) MnO 3− 4 ...
The name of the element is derived from the Greek word χρῶμα, chrōma, meaning color, [12] because many chromium compounds are intensely colored. Industrial production of chromium proceeds from chromite ore (mostly FeCr 2 O 4) to produce ferrochromium, an iron-chromium alloy, by means of aluminothermic or silicothermic reactions ...
chromium(III) nitrate: 13548-38-4 Cr(NO 2) 3: chromium(III) nitrite: Cr(OH) 3: chromium(III) hydroxide: 1308-14-1 CrO 2: chromium(IV) oxide: 12018-01-8 CrO 3: chromium(VI) oxide: 1333-82-0 CrO 4 2−: chromate ion: 13907-45-4 CrO 2 Cl 2: chromium(VI) oxychloride: 14977-61-8 CrPO 4: chromium(III) phosphate: 7789-04-0 CrSb: chromium antimonide ...
This page was last edited on 20 November 2024, at 15:57 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
• the orange chromium oxyanion Cr 2 O 2− 7 from K 2 Cr 2 O 7 • the yellow chromium oxyanion CrO 2− 4 from K 2 CrO 4 • the turquoise nickel cation Ni 2+ from NiCl 2 • the blue copper cation Cu 2+ from CuSO 4 • the purple manganese oxyanion MnO − 4 from KMnO 4