Thank you for viewing. There is some writing, highlighting, and signs of use, but as it's an expensive book, I'm putting it up for sale. As shown in the photos, the answer key and explanation book are also included. Thank you! +++++ A reference book for pharmacy students explaining pH calculations and ion concentration problems. - Title: Calculation Problem Collection for Pharmacy Students - Author: Yakugaku Seminar - ISBN: 978-4-907586-62-3 - Contents: Includes problems related to pH calculations and ion concentration - Features: Understandable with 5-step explanations!