Thanks Geoo!
This helps a lot. It is on AOS2, outcome 2. Is chapter 6 relevant too?
OKay, well chapter 6 isn't apart of AOS 2, it is AOS 1.
So I wouldn't do that one.
If it is on AOS 2, then chapters 7 and 8 become relevant as well, as that is all on rate of reactions and equailibrium which are large parts of AOS 2. I would check with your teacher to double check on what part of AOS 2 do you need to know. If it is only electrolysis, great, then do chapter 9 (4 + 5 if you can, but don't do all of it, it's just a very good foundation). If it is on rates of reactions and equailibrium, then you would also need to do chapters 7 and 8. 7 is short but 8 is huge, so to reduce your stress, ask your teacher specifically on what the SAC will be all about. For time management I would nickpick at the basics in what is in chapter 4 and 5, as you may run out of time unless you are happy to do all of it.