I've just helped my cousin with her year 11 exams about 2 weeks ago and the past paper she showed me had a lot of calculations and Chemistry that is actually useful (it gets worse in year 12).
You can try these:
- Calculations involving the concept of mole, molar, volume and mass
- A few must-knows in Chemistry, namely
The Law of Mass Conservation and
Le Chatelier's Principle
- Using solubility tables to deduce solubility
- Separation techniques (both chemical and physical)
- Balancing equations and writing different types of equation, e.g ionic, net-ionic (make sure you know what a spectator ion is)
- Some redox chemistry, know all your definitions and be able to read the standard electrode potentials and know what they mean and do calculations with them
That should give you a rough idea of what to study
Having said that, you should always look at your syllabus and find out what you have to study instead of... Ahhhh, nevermind...
P.S. Work yourself through the emperical formula of MgO calculations (you should have done that as a prac - most peope I know did) That question seems immensely popular and it involves various important concepts. If you can work that through with no problems you should at least pass
Also make sure you know how to work the signs for electrochem questions, many people have difficulties grasping the calculations involved.. Good luck!