This advanced chemistry text has been updated to match the specification for A Level Chemistry from September 2000. The problems have been revised and graded to allow more differentiation, helping the teacher to teach students of a wide range of abilities. The new editions of all the texts in this series should make it easier for teachers to match their teaching to the new modular specification. There are new activities to cover ICT and key skills, and end-of-unit tests to give students practice.