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

2 Answers
anor277
Dec 11, 2017

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....

Michael
Apr 7, 2018

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)#

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