Chemical elements
  Cerium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Cerous hydride
      Cerous fluoride
      Cerous chloride
      Cerous oxychloride
      Cerous bromide
      Cerous iodide
      Cerous perchlorate
      Cerous bromate
      Cerous iodate
      Cerous oxide
      Cerous sesquioxide
      Cerous hydroxide
      Cerous sulphide
      Cerous persulphide
      Cerous oxysulphide
      Cerous sulphite
      Cerous sulphate
      Cerous dithionate
      Cerous selenite
      Cerous selenate
      Cerous chromate
      Cerous molybdate
      Cerous tungstate
      Cerous nitride
      Cerous nitrite
      Cerous nitrate
      Cerous hypophosphite
      Cerous orthophosphate
      Cerous vanadate
      Cerous carbide
      Cerous silicide
      Cerous carbonate
      Cerous thiocyanate
      Cerous platinocyanide
      Cerous oxalate
      Cerous silicate
      Ceric fluoride
      Ceric chloride
      Ceric iodate
      Ceroceric oxide
      Ceroceric hydroxide
      Ceric oxide
      Cerium dioxide
      Ceria
      Ceric hydroxide
      Perceric hydroxide
      Ceric hydrosulphate
      Ceric sulphate
      Ceric selenite
      Ceric chromate
      Ceric molybdate
      Ceric nitrate
      Ceric ammonium nitrate
      Ceric orthophosphate
      Ceric dihydrogen arsenate
      Ceric carbonate
      Perceric carbonate
      Ceric acetate
      Ceric oxalate
      Ceric acetylacetonate
      Ceric borate
    PDB 1ak8-1n65

Ceric oxalate, Ce(C2O4)2






Ceric oxalate, Ce(C2O4)2.7H2O (?). - Ceric oxalate is obtained as an orange-yellow gelatinous precipitate when cold, aqueous solutions of ceric ammonium nitrate and ammonium oxalate are mixed. The precipitate is difficult to filter and wash, and when attempts are made to dry it on a porous plate, considerable decomposition occurs; apparently a mixture of cerous oxalate, Ce2(C2O4)3.10H2O, and ceric oxalate, Ce(C2O4)2.7H2O, is produced, from which ceric oxalate may be extracted with aqueous ammonium oxalate. Cerous oxalate is a very unstable salt, readily losing carbon dioxide and becoming converted into cerous oxalate: -

2Ce(C2O4)2 = Ce2(C2O4)3 + CO2.

It is readily soluble in ammonium oxalate solution, thereby resembling thorium oxalate. The orange-yellow solution deposits cerous oxalate on standing, the decomposition being rapid when the solution is warmed. The cerium may be rapidly and quantitatively precipitated from the solution by the addition of sulphurous acid.
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