- Cerium(IV) sulfate
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Cerium(IV) sulfate Other namesCeric sulfateIdentifiers CAS number 13590-82-4 ,
10294-42-5 (tetrahydrate)ChemSpider 21160156 Jmol-3D images Image 1 - [Ce].[O-]S(=O)(=O)[O-].[O-]S([O-])(=O)=O
Properties Molecular formula Ce(SO4)2 Molar mass 332.24 g/mol (anhydrous)
404.304 (tetrahydrate)Appearance Yellow solid (anhydrous)
yellow-orange crystals (tetrahydrate)Density 3.91 g/cm3 (tetrahydrate) Melting point 350 °C (decomp.)
Boiling point NA
Solubility in water Soluble in small amounts, hydrolyzes in large amounts of water
21.4 g/100 mL (0°C)
9.84 g/100 mL (20°C)
3.87 g/100 mL (60°C)Solubility soluble in dilute sulfuric acid [1] Structure Crystal structure orthorhombic Hazards MSDS External MSDS Main hazards Oxidizer sulfate (verify) (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)Infobox references Cerium(IV) sulfate, also called ceric sulfate, is a yellow to yellow/orange chemical compound. It exists as the anhydrous salt Ce(SO4)2; a few hydrated forms are also known: Ce(SO4)2 ⋅ xH2O, with x equal to 4, 8, or 12. Ceric sulfate is available commercially.
Properties
Ceric sulfate is moderately soluble in water and dilute acids. Its neutral solutions slowly decompose, depositing the light yellow oxide CeO2. Solutions of ceric sulfate have a strong yellow color.
The tetrahydrate will lose the water when heated to 180-200 °C.
Uses
The ceric ion is a strong oxidizer, especially under acidic conditions. If ceric sulfate is added to dilute hydrochloric acid, then elemental chlorine is formed, albeit slowly. With stronger reducing agents it reacts much faster. For example, with sulfite in acidic environments it reacts quickly and completely.
When ceric compounds are reduced, so-called cerous compounds are formed. The reaction taking place is:
- Ce4+ + e− → Ce3+
The cerous ion is colorless.
Ceric sulfate is used in analytical chemistry for redox titration, often together with a redox indicator.
References
- ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398
Cerium compounds
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