Welcome Back! Catalyst: 1. Pick up all handouts by the door 2. Turn Chapter 1 and 2 homework into the bin for your period. 3. How many significant figures are in ( )(0.034) = ? (GIVE CORRECT SIG FIGS) = ? (GIVE CORRECT SIG FIGS)

Syllabus

I Buy! You Buy!

What You Need Everyday 1. 3 Ring Binder with 5 Tabs PowerPoints, In-Class Handouts, Homework, Lab, Quizes/Tests. Learning Target Logs go in front of PowerPoint Tab It is recommended that it be at least 1 ½ inches thick. 2. Notebook 3. TI-30X Calculator 4. Pen/Pencil 5. Lab Notebook Will be available to purchase from Mr. Lance ($10) Only needed on lab days

Grade for this Class 1. Exams (45%) 2. Class Work/Homework (10%) Homework is due on the day of the exam. Answers will be posted at least 2 days prior to the exam. Also, will receive 5 EC points on unit exam 3. Labs/Write Ups/Projects (20%) 4. Quarter and Semester Mock AP Exams (25%)

Letter Grade for this Class Letter GradePercent A (5.0 – 4.1)100% - 85% B (4.0 – 3.1)84.9% - 70% C (3.0 – 2.1)69.9% - 55% NP (2.0 – 0.0)54.9% and below

College Note Taking

Reflection on Note Taking With your table: Compare your notes on the PowerPoint against Mr. Lance’s. What did you miss? How are you going to have to work to improve these skills throughout the year?

Note Taking Policy for AP Chemistry I will give you a printout of the slides for the day’s lecture when you come into class It is your responsibility to annotate these notes. You need to add ideas from the lecture, problems we do in class, and/or other relevant information.

Quick Write 1. What percentage of Hispanics do you think passed the AP Chemistry Exam in 2011 with a 3 or higher? 2. What percentage of Whites do you think passed the AP Chemistry Exam in 2011 with a 3 or higher? 3. What percentage of students nationally passed the AP Chemistry Exam in 2011 with a 3 or higher

Harvard-Westlake Scores

Goal Setting With your group: What percent of the class do you want to see pass the AP Chemistry exam with a 3 or higher? What is it going to take to achieve this goal? CONCRETE ACTIONS

Group Share

Class Goal Setting

Average Time Spent Studying by Major

AP Chemistry Expectation For every hour of class time, you should spend at least an hour at home studying!

Unit 0 Learning Target Log

LECTURE 1.1 – SIG FIGS.

Precision and Accuracy Precision – Measure of how close individual measurements agree with one another A standard deviation tells someone how precise you were during a laboratory. Accuracy – How close individual measurements agree with the “true” value.

Significant Figures There is always uncertainty in the last digit of any quantity that we report. Significant Figures – All digits of a measured quantity The number of digit reported represent the number of significant figures a number has

Determining the Number of Sig Figs The most important rule is that all nonzero digits in any measurement are significant: 1. Zeros between nonzero digits are always significant. For example, 1005 has ______ sig figs. 2. Zeros at the beginning of a number are never significant. For example, has _____ sig fig. 3. Zeros at the end of a number are significant only if there is a decimal. For example, 3.0 has ____ sig figs, but 30 has _______ sig fig.

A Note on Scientific Notation Recall that we can write a number like 10,300 in scientific notation as 1.03 x 10 4 This number would have _____ sig figs

Sig Figs for Calculations Determine sig figs only after a calculation is complete.

Sig Fig for Addition/Subtraction When you add/subtract numbers, the answer has the same number of decimal places as the number with the least decimal places. Round off to one decimal place since 83.1 has the least number of decimal places! Final answer you report is 104.8

Sig Figs for Multiplication/Division When you multiply or divide numbers, the answer has the same number of sig figs as the number with the fewest sig figs. 4 sig figs 2 sig figs, so the answer needs 2 sig figs 32 cm 2

Sig. Fig Practice Complete Problem Set 1.1 Be sure to use the appropriate units!

Closing Time Have all supplies by Thursday/Friday Quiz on Ch. 1 and 2 on Thursday/Friday Homework will be available for pickup by the end of Tuesday (Answers posted on class website). Focus on metric system, sig figs, dimensional analysis, and naming!