For my AS, I used the Hodder Education books.
For my A2, I used the Edexcel published books.
~This is how I got the answers:
-When yuh insert the CD, open folder 'eda2chem' (in yer case, perhaps - 'edaaschem')
-After that, folder- 'ab'.
-After that, there's is a list of MS word documents. The answers will be there.
Lemme know if yuh get them. (: