Chapters in Chang (hereafter referred to as "the text") are assigned in the attached Schedule. It is IMPERATIVE that you read the assignments BEFORE I cover them in class. I will assume that I am discussing the material with people who have read it; if you haven't, you will not get as much help from the class, and you will find it much harder to work problems and prepare for exams. Also be aware that I will not "cover" enerything in your assignments, but you are responsible for all assigned readings. I will ask questions in class in order to engage you in discussion of the experiments, results, interpretations, and problem-solving methods that form the subject of chemistry.
Problem-solving is the most important part of your study. The problems are not a test to be done at the end of your work on each chapter. Instead, they are devices for teaching and reinforcing the principles in the body of the chapter. So you should start trying to work problems as soon as you have read the material for the first time.
Try to solve all problems without looking at the answers. If you cannot work a problem, look back through the chapter to find and reread pertinent material. Then try again to work out an answer to the problem. Try to find fault with your answer before you check it. (In real life -- and on tests -- the answers are not in the back of the book. Scientists hold all of their answers tentatively until they find something wrong with them. Scientists practically never get clear yes-or-no answers to their questions.) If you simply read the problem and then turn to the answer, you will not be prepared for the exams, on which you must arrive at answers, and then decide for yourself whether they are worthy of your confidence.
No problem is more, or less, important than another. The real value of any problem is its capacity to put you into the dark and develop your skill at using important concepts to find the light. So I do not assign specific problems. Work at many as time allows, sampling problems pertaining to all sections of assigned material.
At least 50% of the material on exams will be derived from problems at the end of the chapters. At least 20% of the material on exams will be derived from assigned material that is not covered in class. If you follow the guidelines on how to study, you will be prepared for exams.
Any chemistry course covers a lot of ground in one semester. If you fall behind, you cannot take proper advantage of the class and review sessions, and you will not know where your difficulties lie until the rest of the class is far beyond you. You cannot hope to cram for the exams in this course; the only way you will be ready for them is to study the material and work problems regularly, in the manner I urge in the paragraphs above.