Naming chromium oxides CrO3 and Cr2O3

[chemist2b]

So I'm a little confused about the nomenclature of this compound (CrO3). is it chromium (VI) oxide? chromic acid? and then Cr2O3 is just plain Chromium (III) oxide right?

 

[AGNuke]

Yes, that's it!

 

[chemisttree]

The oxygens in CrO₃ and Cr₂O₃ each have a formal charge of -2.

Neither of these is chromic acid.

 

[AGNuke]

CrO₃ is Chromium (VI) Oxide or Chromic Anhydride, as if we add water in it, it forms Chromic Acid, which is H₂CrO₄

 

[chemisttree]

CrO₃ is Chromium (VI) Oxide or Chromic Anhydride, as if we add water in it, it forms Chromic Acid, which is H₂CrO₄

The equilibrium of aqueous chromium trioxide lies far to the reactants side. Are you saying that aqueous chromic acid contains significant OH-?

 

[AGNuke]

I don't get what you meant. I consulted my teacher and he said that CrO₃ is an acidic oxide, thus it can also be referred to as acidic anhydride.

He also mentioned that H₂CrO₄ is a strong acid, can be considered as an analogue to Sulphuric acid. I can't get what you meant from equilibrium.

See This : Chromium Trioxide