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Most of us have used aspirin at some time in our lives, but few will know that a related compound derived from willow bark has been used to relieve pain and treat fevers for over 2,000 years. Aimed at post-16 students in chemistry, this book contains activities for both academic and vocational courses. Ranging from preparative/analytical to problem-solving exercises, the activities can be used singly or as a coherent package. A guide for teachers and technicians is also included.