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Sodium Oxalate
Sodium oxalate, or disodium oxalate, is the sodium salt of oxalic acid with the formula Na2C2O4. It is a white, crystalline, odorless solid, that decomposes above 290 °C. Disodium oxalate can act as a reducing agent, and it may be used as a primary standard for standardizing potassium permanganate (KMnO4) solutions. The mineral form of sodium oxalate is natroxalate. It is only very rarely found and restricted to extremely sodic conditions of ultra-alkaline pegmatites. Preparation Sodium oxalate can be prepared through the neutralization of oxalic acid with sodium hydroxide (NaOH) in a 1:2 acid-to-base molar ratio. Evaporation yields the anhydrous oxalateH. W. Foote and John E. Vance (1933), "The system; sodium iodate, sodium oxalate, water". ''American Journal of Science'', series 5, volume 26, issue 151, pages 16-18. that can be thoroughly dried by heating to between 200 and 250 °C. Half-neutralization can be accomplished with NaOH in a 1:1 ratio which produces NaHC2O4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium Hydrogenoxalate
Sodium hydrogenoxalate is salt (ionic compound) of formula , consisting of sodium cations and hydrogenoxalate anions or . The anion can be described as the result of removing one hydrogen ion from oxalic acid , or adding one to the oxalate anion . Properties Hydrates The compound is commonly encountered as the anhydrous form or as the mono hydrate ·. Both are colorless crystalline solids at ambient temperature. The monohydrate can be obtained by evaporating a solution of the compound at room temperature.C. Ramki, R. Ezhil Vizhi (2017): "Growth, optical, electrical and mechanical properties of sodium hydrogen oxalate hydrate (NaHC2O4·H2O) single crystal for NLO applications". ''Materials Chemistry and Physics'', volume 197, pages 70-78. The crystal structure of NaHC2O4·H2O is triclinic normal (pinacoidal, space group ''P''). The lattice parameters are ''a'' = 650.3 pm, ''b'' = 667.3 pm, ''c'' = 569.8 pm, ''α'' = 85.04°, ''β'' = 110.00°, ''γ''â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |