Asked by Amee

What is the oxidation state of Cr in each of the following compounds?

(a) CrO
(b) CrO3
(c) Cr2 O3

Answers

Answered by Dr. Jane
Oxygen is always -2

So for the first one Cr will be +2

Now can, you figure out the other two?
Answered by Amee
Could you give an example with a written equation?
Answered by DrBob222
Dr Jane gave you an example. For CrO, O is -2 and since all compounds are zero, Cr must be +2. The other are done the same way and O is -2 in them as well.
Answered by Amee
I am really having a hard time. I am taking an online class and math is not my strong. Do I divide or multiply?
Answered by Becky
a. +2
b. +6
c. +3
We know that O is always -2 (well in most case scenerios) but when it is O2 we must take that into consideration making it -6 and then you need to make the sum 0 so that would make CR +6. And this same mindset can be used to solve #3.
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