Английская Википедия:Cobalt(III) oxide

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Cobalt(III) oxide is the inorganic compound with the formula of Co2O3. Although only two oxides of cobalt are well characterized, CoO and Co3O4,[1] procedures claiming to give Co2O3 have been described. Thus treatment of Co(II) salts such as cobalt(II) sulfate with an aqueous solution of sodium hypochlorite (also known as bleach) gives a black solid:[2][3]

2CoSO4 + 4NaOH + NaOCl → Co2O3 + 2Na2SO4 + NaCl

Some formulations of the catalyst hopcalite contain "Co2O3".

Some studies have been unable to synthesize the compound, and report that it is theoretically unstable.[4]

It is soluble in cold diluted sulfuric acid and produces Co2[SO4]3, which is blue in aqueous solution.

Co2O3 + 3H2SO4 → Co2[SO4]3 + 3H2O

Cobalt(III) ion is a strong oxidizer in acidic solution, its standard electrode potential is +1.84V in this situation.[5]

See also

References

Шаблон:Reflist

Шаблон:Cobalt compounds Шаблон:Oxygen compounds

  1. Шаблон:Greenwood&Earnshaw2nd
  2. Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1675.
  3. Шаблон:Cite journal
  4. Шаблон:Cite journal
  5. Шаблон:Cite book