Determining Oxidation numbers

[Mara Lockhart 3J]

For problem 13.1, part a asks us to identify the elements undergoing changes in oxidation state and indicate the initial and final oxidation numbers for these elements. I am not sure how to to find the initial and final (the solutions manual got C was oxidized from 2- to 1-). How do we identify these numbers?

[Niharika Reddy 1D]

Fundamentals Section K of the textbook (pages F78-F81) explains how to assign oxidation numbers with some examples. I have attached a picture of the rules for assigning oxidation numbers.

[Kayla Denton 1A]

At the beginning of my video here I explain how to assign oxidation numbers!

viewtopic.php?f=139&t=5147

Also, this is more clear than the textbook—it's from my old IB Chem HL textbook. (Hope this isn't illegal to post.)