125 Chem Winter 2008
Dr. Retsek
Study Guide for Final Exam
Chem 125-11 Final Exam: Monday, March 17th from 1:10 p.m. 4:00 p.m. For Final Exam, you will need a non-programmable, non-graphing calculator (You will NOT be allowed to share or borrow a calculator or use a cell phone for a calculator during the exam. Anyone who does will get a zero on the exam.) a #2 pencil Final Exam Protocol: (same as other exams) When you come in the room for the Exam, take your pencil, eraser, calculator, out of your backpack and leave your backpack along the walls of the classroom. (No backpacks in the aisles so I can move through the aisles to answer questions as they come up). Try to leave the left-handed desks open for those students who are left-handed. Remove the calculator from any covers or cases and leave those in your backpack as well. You will be given a scantron, periodic table, and the equation sheet posted on the webpage. Read each question and the directions carefully. The directions may change from problem to problem. You MUST show your work in a logical, easy to read fashion to receive credit on the exam. Follow all of the rules of significant figures and label all answers with the appropriate units. The Final Exam will cover chapters 4 (section 5 only), 12 (sections 1-5), 13, 16, 17, 18, 19 (section 2 only), 20 (section 4 only), and 21. For chapter 21, focus on the material that was covered in lecture (primarily sections 1, 2, 3, 4 ("plug and chug" calculations), and 6 (only detail in class). For chapter 21, use your notes and the text problems to get an idea of the questions I could ask. The final exam can include material in the readings, any problems assigned from those chapters, worksheets, and anything covered in lecture. Your Chem 125 final is NOT A COMMON FINAL. The exam will only have questions written by me and will be the same format as your other exams, meaning the exam can consist of multiple choice questions, some true-false questions, some short answer questions, and some problems. etc. I am writing a final exam that will be 1.5 1.75 times the length of a midterm. It should take you about 2 hours to 2 hours and 15 minutes to complete, but you will have the entire 2 hours and 50 minutes to finish the exam. The points on the final exam will be distributed approximately as follows: Exam 1 material: 20-30% Exam 2 material: 20-30%
Chem 125 Winter 2008
Dr. Retsek
Exam 3 material: 20-30% Material since Exam 3: 10-15% Look to the study guides for Exam 1, 2, and 3 for what can be covered from those sections. What should you know from Chapter 21? (since Exam 3) Can you balance a redox reaction acidic under or basic conditions? What are the key differences between a voltaic and electrolytic cell? Definitions of electrode, electrolyte, anode, cathode, and half-cell Can you diagram a voltaic cell and identify the anode, cathode, oxidation reaction, reduction reaction, direction of electron flow, find the salt bridge, direction of ion flow? Difference between an active an inactive electrode Write the notation for voltaic cell. What do single vertical lines stand for? A double vertical line? What if all components are in the same phase? Where do inactive electrodes appear? What is cell potential? Standard cell potential? Standard electrode potential? Can you rank substances based on strength of oxidizing agent or reducing agent? How are G and Ecell related? What sign do they have if a reaction is spontaneous? How to find equilibrium constant from G and Ecell. How to find G and Ecell for cells that are not under standard conditions What is corrosion? What is required for corrosion? What makes it happen faster? What are the key steps in the corrosion of iron? How can you prevent the corrosion of iron?
What should you know from Lab? You should focus on the labs that the material and data correlate well to the lecture material. There will not be any lab specific questions (like what does this reagent do, etc.) In some labs, the material was particularly relevant to the course. In particular focus on the following experiments: Colligative Properties Kinetics (not so much on the Excel data treatment, but once you get the rate constant, what you do from there.) Equilibrium Titrations (very important!) Electrochemistry Tips and Advice for the Final Exam: My biggest tip and suggestion for the final exam is to look over old exams and quizzes and FIX YOUR MISTAKES!!!! A large portion of the exam will consist of problems that you have seen before or variations on some of them (particularly problems that a large portion of the class missed). Some topics were covered in greater
Chem 125 Winter 2008
Dr. Retsek
detail than others and the final exam will reflect that. (For example, compare IMFs to oxidation numbers). Also, we have done a lot of graphing this quarter. Make sure you know how to read graphs and pick out information from them. Which graph tells you what? What does the slope tell you? The y-intercept? When do you estimate? When do you use the equation of the line? Finally, look over the problems you have done both in the text and on the worksheets. Also, look over your notes. I write my exams from my notes. Help before the Exam: Office hours: Sunday from 3:00 -5 p.m. Discussion Board Email