Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Sodium tetrathionate is a salt of sodium and tetrathionate with the formula Na2S4O6.xH2O. The salt normally is obtained as the dihydrate (x = 2). It is a colorless, water-soluble solid. It is a member of the polythionates, which have the general formula [Sn(SO3)2]2-. Other members include trithionite (n = 1), pentathionate (n = 3), hexathionate (n = 4).[1]
Sodium tetrathionate is formed by the oxidation of sodium thiosulfate (Na2S2O3), e.g. by the action of iodine:[1]
2 Na2S2O3 + I2 → Na2S4O6 + 2 NaI
The reaction is signaled by the decoloration of iodine. This reaction is the basis of iodometric titrations.
Other methods include the coupling of sodium bisulfite with disulfur dichloride:[1]
2 NaHSO3 + S2Cl2 → Na2S4O6 + 2 HCl
The ion has ideal C2 symmetry, like H2S2. The S-S-S dihedral angle is nearly 90°. The central S-S distance is 2.115 Å, 0.01 Å longer than the two other S-S distances as well as those distances in most polysulfanes.[2]
Structure of tetrathionate as its dihydrated sodium salt.[2]
^ abcGreenwood, N. N.; Earnshaw, A. (2 January 1991). Chemistry of the Elements - 3rd Edition. Elsevier. doi:10.1016/C2013-0-11881-8. ISBN 978-1-4832-8008-0. OCLC 1040594550. Retrieved 2022-02-15.
^ abP. C. Christidis; P. J. Rentzeperis; C. A. Bolos (4 January 1986). "Crystal structure and chirality of sodium tetrathionate dihydrate, Na2S4O6·2H2O". Zeitschrift für Kristallographie. 177 (1–2): 107–p116. Bibcode:1986ZK....177..107C. doi:10.1524/zkri.1986.177.1-2.107.
and 12 Related for: Sodium tetrathionate information
Sodiumtetrathionate is a salt of sodium and tetrathionate with the formula Na2S4O6.xH2O. The salt normally is obtained as the dihydrate (x = 2). It is...
Sodium thiosulfate (sodium thiosulphate) is an inorganic compound with the formula Na2S2O3·(H2O)(x). Typically it is available as the white or colorless...
ISBN 978-0-08-037941-8. Oltmann, L. F.; Stouthamer, A. H. (1975-10-27). "Reduction of tetrathionate, trithionate and thiosulphate, and oxidation of sulphide in proteus...
and dusk.[citation needed] Thiosulfate ions react with iodine to give tetrathionate ions: 2 S2O2−3 + I2 → S4O2−6 + 2 I− This reaction is key for iodometry...
been obtained from SCl2, sodium thiosulfate, and potassium acetate. Initially prismatic crystals of potassium tetrathionate appear, then lamellar crystals...
years, numerous studies have shown the presence of ions, in particular tetrathionate and pentathionate anion (S 4O2− 6 and S 5O2− 6, respectively). H 2S...
reacts with iodine to give tetrathionate, in this case potassium thiosulfate reacts with iodine to produce potassium tetrathionate and potassium iodide: 2...
elemental sulfur, sulfite, thiosulfate, and various polythionates (e.g., tetrathionate). They depend on enzymes such as sulfur oxygenase and sulfite oxidase...
sulfate, produced on both plates during the discharge of a lead–acid battery Sodium laureth sulfate, or SLES, a common detergent in shampoo formulations Polyhalite...
them oxidize sulfite (SO32-) and tetrathionate (S4O62-). In the following example reaction, thiosulfate appears as sodium thiosulfate (Na2S2O3) and is oxidized...
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