Potassium hypochromate

Potassium hypochromate
Names
Other names
  • Potassium chromate(V)
Identifiers
3D model (JSmol)
  • O=[Cr-3](=O)(=O)=O.[K+].[K+].[K+]
Properties
K3CrO4
Molar mass 233.2886 g/mol
Appearance Green solid
Melting point 1,000 °C (1,830 °F; 1,270 K) (decomposes)
Soluble, decomposes (25 °C)[1]
Structure
Similar to potassium hypomanganate
Thermochemistry
-370 ± 2 kcal mol−1[2]
Hazards
Flash point Not flammable
Related compounds
Other anions
 Potassium hypomanganate
Other cations
 Sodium hypochromate
Related chromates
 Potassium chromate
Potassium perchromate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Potassium hypochromate is a chemical compound with the formula K3CrO4 with the unusual Cr5+ ion. This compound is unstable in water but stable in alkaline solution[1] and was found to have a similar crystal structure to potassium hypomanganate.[2]

  1. ^ a b N. Bailey; M. C. R. Symons (1957). "Structure and reactivity of the oxyanions of transition metals. Part III. The hypochromate ion". Journal of the Chemical Society (Resumed). 35: 203–207. doi:10.1039/jr9570000203.
  2. ^ a b Lawrence H. Johnson; Loren G. Hepler; Carlos E. Bamberger; Donald M. Richardson (1978). "The enthalpy of formation of potassium chromate(V), K3CrO4(c)". Canadian Journal of Chemistry. 56 (4). The Ohio State University: National Research Council: 446–449. doi:10.1139/v78-071.