Here is a powerpoint with all of the calculations needed for the C2 (Chemistry section). This is for students taking AQA Additional Science. This powerpoint contains the equations, information you need to know, worked out examples and practice questions! There will soon be another powerpoint in my area containing the answers to this powerpoint. I hope this helps you to revise! Please rate and comment on how to improve :D Also, I have a study group called AQA Additional Science where we discuss topics such as this one and many more! Feel free to become a member, the more the merrier!