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The acid is prepared by the reaction of chlorosulfuric acid with hydrogen peroxide: [3]. 2 ClSO 3 H + H 2 O 2 → H 2 S 2 O 8 + 2 HCl. Another method is the electrolysis of moderately concentrated sulfuric acid (60-70%) with platinum electrodes at high current density and voltage:
The peroxydisulfate ion, S 2 O 2− 8, is an oxyanion, the anion of peroxydisulfuric acid.It is commonly referred to as persulfate, but this term also refers to the peroxomonosulfate ion, SO 2−
One laboratory scale preparation of Caro's acid involves the combination of chlorosulfuric acid and hydrogen peroxide: [6]. H 2 O 2 + ClSO 2 OH ⇌ H 2 SO 5 + HCl. Patents include more than one reaction for preparation of Caro's acid, usually as an intermediate for the production of potassium monopersulfate (PMPS), a bleaching and oxidizing agent.
The linkage between the oxygen molecules is known as a peroxy group (sometimes called peroxo group, peroxyl group, of peroxy linkage). The nomenclature of the peroxy group is somewhat variable, [ 4 ] and exists as an exception to the rules of naming polyatomic ions.
A persulfate (sometimes known as peroxysulfate or peroxodisulfate) [1] is a compound containing the anions SO 2− 5 or S 2 O 2− 8. [2] The anion SO 2− 5 contains one peroxide group per sulfur center, whereas in S
Structure of CrO(O 2) 2 (pyridine).Hydrogen atoms bonded to carbon atoms are omitted. Color code: Cr = gray, C= black, H = white, O= red, N = blue. Chromium(VI) oxide peroxide is formed by the addition of acidified hydrogen peroxide solutions to solutions of metal chromates or dichromates, such as sodium chromate or potassium dichromate.
Molecular orbital diagram of the peroxide ion. The peroxide ion is composed of two oxygen atoms that are linked by a single bond. The molecular orbital diagram of the peroxide dianion predicts a doubly occupied antibonding π* orbital and a bond order of 1.
Oleum (Latin oleum, meaning oil), or fuming sulfuric acid, is a term referring to solutions of various compositions of sulfur trioxide in sulfuric acid, or sometimes more specifically to disulfuric acid (also known as pyrosulfuric acid).