Question 6K.1

[April_Tello_2H]

The following redox reaction is used in acidic solution in the Breathalyzer test to determine the level of alcohol in blood:
H+(aq) + Cr2O72−(aq) + C2H5OH(aq) → Cr3+(aq) + C2H4O(aq) + H2O(l)
Identify the elements undergoing oxidation or reduction and indicate their initial and final oxidation numbers.

I was wondering how you would work through this question step by step, the answer key doesn't give much detail to how you received the answers and I was getting confused on how there was an oxidation that went from 6+ to 3+ and so on. Can someone please explain to me how this problem is being done and break it down ?! please and thank you :)

[Taryn 1J]

Attached is an image of my work for this problem :)