This book is intended for use by students of S.1 – S.4 preparing for Uganda Certificate of Education (UCE). The book covers the entire syllabus recommended by National Curriculum Development Centre (NCDC) in conjunction with Ministry of Education and Sports. A lot of theoretical treatment of the mole concept especially calculations have been treated well; mathematical concepts required in this topic have been simplified. In Electrolysis, key terms involved and explanations have been given utmost treatment to enhance learning and understanding. This book has been carefully planned to enable students understand the subject and be able to make conclusions. At the end of every topic, enough exercises have been included to keep students busy and testing the understanding of the topic. With this book’’essentials of Chemistry” hardworking and serious students are destined to excel. It is hoped that the book will be useful to both teachers and students to enhance the mastery of the subject. Use this book always and success will automatically be yours.

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