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.
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+
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 → Na 2 SO 4 + Cr 2 O 3. The oxide is also formed by the decomposition of chromium salts such as chromium nitrate, or by the exothermic ...
In acid solution the aquated Cr 3+ ion is produced. Cr 2 O 2− 7 + 14 H + + 6 e − → 2 Cr 3+ + 7 H 2 O ε 0 = 1.33 V. In alkaline solution chromium(III) hydroxide is produced. The redox potential shows that chromates are weaker oxidizing agent in alkaline solution than in acid solution. [6] CrO 2− 4 + 4 H 2 O + 3 e − → Cr(OH) 3 + 5 OH −
Cr(NO 3) 3: 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 ...
Cerium(III) hydroxide – Ce(OH) 3; Cerium(III) iodide – CeI 3; Cerium(III) nitrate – Ce(NO 3) 3; Cerium(III) oxide – Ce 2 O 3; Cerium(III) sulfate – Ce 2 (SO 4) 3; Cerium(III) sulfide – Ce 2 S 3; Cerium(IV) hydroxide – Ce(OH) 4; Cerium(IV) nitrate – Ce(NO 3) 4; Cerium(IV) oxide – CeO 2; Cerium(IV) sulfate – Ce(SO 4) 2; Cerium ...
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 following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.