AQA chemistry today - module 4Watch
it was AWFUL!! i couldn't do any of section B, so i just had to make random guesses! i really hope the grade boundaries come down for this one - how did everyone else find it? so not looking fiorward to mod 5 and synoptic on tuesday!
Do the grade boundaries realli go down if a lot of ppl dont do well in the exam? i thot they remained "fixed" n u have to get over 80% to get an A in the exam, whether or not ppl found it hard??????
Then it said that when the concentration of A was trebled, and the concentration of B was halved, the rate increased by a factor of nine. This means the order w.r.t. A was 2, and w.r.t. B it was 0.
So the rate equation was
R = k[A]^2