Finished the chem unit 3 today (YAY), and i'd have to say:
Biochemistry was alright thanks to bio this year; as is all the stoic stuff (Redox, acid/base etc.)
Chromatrography is alright, i just think of Gel electrophoresis as the molecules are seperated by size and dispersion forces.
Spectroscopy, i found most of the questions regarding the graphs etc. alright, but i struggled a little bit with the actual theory behind it, like WHY each method is used as opposed to the other and HOW each method works. i'll probs review this stuff again
Organic chem is alright as well, really just extension from yr 11, (which i sucked at) so ill probs review it as well before the holidays finish.