Few topics generate as much excitement at teacher feedback meetings as that of reaction mechanisms.
Please note that these pages represent my views, and do not constitute a policy document from Edexcel or any other examining body. Markschemes are not model answers. The published markscheme is an attenuated version of the one used by examiners to mark the papers. It does not address all the possible routes via which credit can be obtained, the principle being that correct chemistry scores. The representation of mechanisms does not require certain hoops to be jumped.