Question

How is chromium(II) oxide oxidized to `Cr_2O_3`?

Answer 1

Would you recheck the question.....?

Explanation:

`CrO+2H^+ rarrCr^(3+) + e^(-)+H_2O`

`"Chromium(II) oxide"` is known but rare....in the given equation it is oxidized to `"Cr(III)"`....meanwhile chloride is oxidized to chlorine gas....and potassium is also oxidized; protium ion is likely to be reduced to dihydrogen gas....

Answer 2

By atmospheric oxidation.

Explanation:

The Cr(II) state is very unstable and normal atmospheric conditions will causes oxidation to chromium(III) oxide.

`sf(2CrO+1/2O_2rarrCr_2O_3)`