AP Chemistry

1. AP Chemistry 2012 – 2013 School Year

2. Welcome • Welcome to AP Chemistry with Ms. Osquist! • Please take a seat wherever you would like and write the following on a note card: • Your name • Your email address • A hobby or activity you enjoy • What you hope to get out of this class. • If you do not know someone sitting at your table, introduce yourself!

3. Expectations • Come to class prepared! • Pencils, paper, binder, lab notebook, textbook, calculator, etc. should be brought everyday. • Complete every assignment on time and to the best of your ability. • Attend one after school tutoring session each week. • Respect your classmates and their comments. • Help each other out!

4. The AP Exam • May ?, 2013 • The exam consists of 75 multiple choice questions which you will have 90 minutes to complete without a calculator! Followed by 6 free response questions for which you will have another 90 minutes; you may use your calculator for 3 of the 6 free response questions.

5. Grades • Grades will be broken down in the following manner: • 60% quizzes and exams • 30% for laboratory work • 10% weekly homework assignments • Overall grades are based on the following scale: • 100-90 = A 89-80 = B 79-70 = C 69-60 = D

6. Grading • Exams, Tests, & Quizzes • 4 quizzes or tests per quarter • 1 exam per quarter • Laboratory Work • 6 total labs per quarter • 2 will require formal write ups worth 70 pts each. • 4 labs will be completed in notebook worth 40 points each • Homework • Nightly homework (mostly reading, watching lectures, and sample problems) is not graded but must be completed to be eligible to take the test. • Weekly Homework Sheets worth 20 points each will be collected on Monday of every week and graded for correctness.

7. How Do I get an ‘a’? • Complete all your homework and readings ON TIME. • Complete weekly homework problems on time and ensure they are done correctly, and correct any mistakes • Make your lab reports and notebook perfect (you can come to tutoring to get help with this before they are due!) • Do your best on tests and quizzes!

8. More on quizzes and exams • Each quiz will contain 12 multiple choice and 1 free response question; you will have 30 minutes to complete the quiz. • Exams will contain 40 multiple choice and 3 free response questions; you will have 90 minutes to complete the exam. • Calculators are not permitted on multiple choice questions • Quizzes and exams are cumulative!

9. Weekly Homework • Every Monday you will be assigned a homework sheet. • These are due the following Monday. • They will be graded for correctness. • Any incorrect answers must be corrected at tutoring Monday or Thursday of the same week. • These problems will be focused on review as opposed to new problems.

10. Materials needed • Books – bring to class everyday. (I know they are heavy – but this way you can spend less time in the weight room and more time on AP) • Pencils – absolutely necessary for tests/quizzes/labs • Paper – for taking notes and work • A lab notebook • A binder with dividers; you can devote a section to labs instead of a lab notebook.

11. Website • http://sites.google.com/site/msosquist Email • mnosquist@cps.edu

12. Reading your Textbook • Before you read: activate prior knowledge (what do you already know about the topic?) • As you read: connect reading to prior knowledge or understanding. Identify confusing passages for in class discussion. • After you read: think about what you read.

13. Reading your Textbook • Always start with the “What’s Ahead” section summaries. Try to turn these statements into questions. • There is a summary at the end of the chapter, you may want to read this before you begin reading. • Pay attention to figures and pictures, they often contain a great deal of information. • Pause frequently and allow yourself time to process what you have read. • Don’t skim through examples.

14. Precision and Accuracy • Precision – describes how closely individual measurements agree with each other. • For example, if you get on a scale three times and your weight is 150.1 lbs, 150.0 lbs, and 150.2 lbs the measurement is very precise. • Accuracy – describes how closely individual measurements agree with the actual value. • For example, if you get on a scale at your house and weigh 150.1 lbs and your actual weight is 150.0 lbs, your scale is accurate. • later get on one at the gym and weigh 160.2 lbs the scale is not accurate because it is not giving your actual weight.

16. Significant Figures Tells the certainty of a measurement Measurements should always be estimated to one more digit then there are gradients on the instrument. The last digit is an estimate and therefore is “uncertain”

17. What is the reading for each of the following with the proper number of SIG-FIGs?

19. When reading a graduated cylinder, read the volume at the bottom of the meniscus.

20. Significant Figures in Numbers How do the quantities 3.0-cm and 3.00-cm differ? What does this difference tell us about the device used to measure each? How do the quantities 3.0-cm and 0.030-m differ? RULES FOR DETERMINING THE NUMBER OF SIGNIFICANT DIGITS IN A NUMBER: • All nonzero digits are significant. • Zeroes between two significant figures are themselves significant. • Zeroes at the beginning of a number are never significant. • Zeroes at the end of a number are significant if a decimal point is written in the number.

21. How many significant figures are in each of the following numbers? 345 m 2.00036 cm 0.0005 kg 4500 mL 3.2001 g 6.900 g 345m3 2.00036 cm 6 0.0005 kg 1 4500 mL2 3.2001g5 6.900g4

22. Operations involving Significant Figures • When multiplication or division is performed, answers are rounded to the number of digits that corresponds to the least number of significant figures in any of the numbers used in the calculation. • For the AP exam, a good rule is to use 3 significant figures (or 2 decimal places). • Pay attention the number of significant figures of the numbers given in the problem, your answer should have the same.