Really going to struggle with this exam.

[bec036]

I'm not very strong at chemistry its probably equal with methods in being my worst subject (B on the mid year and I thought that was easy) and i'm just lost with what to study and what to focus on cause every exam i do has completely different stuff especially in terms of calculations

Any suggestions would be great. 

[masonnnn]

i'm in the same boat, unlike other subjects not aiming super high so i'm just trying to learn key concepts so...
understand le chatelier and energy profiles well = easy marks especially with multi-choice
understand all the calculations (equilibrium, acid-base equilibrium, calibration factor and faraday calculations) as they're most likely to be the long short answer questions (basically going to spend today doing lots of calculations questions so they're fresh)
and galvanic cells and electrolysis, how to work with them and the table.
there will likely be a set of whichever chemical you did at the end of AOS1 as well like, sulfuric acid or whatever.

that'd be the main chunk of marks i'd think...

[bec036]

Thanks .. i'm focusing on calculations now too and i'm struggling to find all the equations we need to know. can someone please post them up for me would be greatly appreciated.

[Martoman]

Well predominatly the calculations just use formulas you should know, and even then, you don't need to memorise most of them if you understand them. I posted this rant somewhere on the chemistry boards before. In terms of calculations the ratio techinque and cross multiply usually works with everything and anything.

What I mean by understanding is that if you know that an amp is columbs per unit of time then you don't need to memorise Q = it because well, if you have 5 columbs per second and 5 seconds then gee golly what is the asnwer?

[Greggler]

Yeah as martoman said, for practically anything to do with energy, combustion, enthalpy and all that jazz, ratios and cross multiplying works a charm.
Then on top of that you just need to know::

Faraday's law N(electrons) = Q/F where F=96500, the charge on one mole of electrons

Calibration factor CF= Energy produced or gained/Change in time

Energy produced/gained = Mass x Heat capacity x Change in Temperature

Those are pretty much the only formula's you need to memorise

[bec036]

thank you guuys and good luck with your exam !