Chemistry 131
Text Exercises

 

Office hours for Winter Quarter 2004 just before or after class, or by appointment.

I have half release time so may not be available some days during the week.
Send email or call if you want to set up an appointment.

Class schedule is: M 6-8 pm 131 W 6-8 pm 131 Th 10:30am-noon,Lab Sat. Lab,10am-2pm

Robin Terjeson, Ph.D.

Office: Science 110

Phone number: (360)992-2201

Email: rterjeson@clark.edu

 

Due dates and other assignments are on the Chemistry 131 Home Page. Return to Chemistry 131 Home Page

 

CHEM 131 - HOMEWORK ASSIGNMENTS FROM TEXT Winter 2004 Robin Terjeson Ph.D. phone 360.992.2201, fax 360.992.2860, Mailbox-APH203

These homework problems represent only a small portion (the minimum number) of the of problems you are expected to work. It is the responsibility of the student to know if he/she understands the material.

NO LATE HOMEWORK IS ACCEPTED. Homework is due in class the class meeting after we finish the chapter or as noted in class. You may fax the HW or leave it in my mailbox, 7:30am-4:30pm. I post information and due dates on the Web site each week.

GRADING POLICY (5, 3 or 0) Most problems have answers in the back of the book.

5 = complete and format correct, 3 = incomplete or incorrect format or sloppiness,

0 = not turned in, very sloppy, only 1 or 2 problems completed.

HOMEWORK FORMAT

  1. Write your name, assignment #, and class time in the upper right hand corner of a standard 8.5 x 11" sheet of paper.
  2. Rewrite the entire problem/question. You may type them out if you wish.
  3. Show all work using dimensional analysis with proper units.
  4. Answers (with correct significant figures) are boxed or highlighted in the left margin of the paper. Examples on the back of this page.
  5. Papers are neat.

Prob.# and rewrite the question

Work (neatly and with all units and equations)

Odd-numbered problems and exercises have answers in the back of the book.

Chapter Homework Problems are at the end of the chapter

Discussion Questions
1 29, 35, 40, 45, 49, 53, 55, 59, 63,69, 76, 89, 100, 115, 124, 137. 7, 10, 22, 26, 85 media 148
2 37, 43, 50, 54, 57, 64, 73, 75, 78, 90, 100, 111, 112, 113, 124. 18, 25, media 130
3 21, 37, 41, 53, 71, 74, 85, 90. 93, 99, 111 8, 17, 18, media 120
4 21, 25, 29, 34, 39, 44, 45, 53, 57, 64, 67, 73, 78, 79, 91, 103, 111, 125, 128 13, 15, 18, 97, media 141
5 35, 39, 51, 63, 73, 81, 91, 101, 107, 109, 131 10, 11, 19, 21, media 138
7 33, 36, 40, 45, 59, 65, 68, 75, 79, 84 10, 11, 17, 24 media 94
8 33, 36, 45, 48, 53, 55, 65, 72, 73, 81, 83 12, 14, 15, 16 media 89
9 28, 33, 38, 42, 48, 54, 60, 63, 67, 73, 77, 89, 93, 110 22, 24, 25, media119
10 25, 29, 32, 36, 43, 54, 59, 60, 62, 67, 74, 80(ignore resonance energy calculation). 1, 5, 11, 19, media 85

All students in Chemistry should be working on their Critical Thinking/Problem Solving Ability. The problems in the book help to develop these skills. Formulating questions is a key concept. Each student must: a. comprehend a given question, b. analyze a question for components and c. devise problem solving strategies. As you continue in the course, the problems become more difficult and your skill in critical thinking will improve. Your ability to think critically will be evaluated by quizzes, exams, and group problem solving sessions. The ability to solve problems is extremely important in this course.

When doing problems you should always go through this process. I expect to see the type of calculations and labeling on labs, homework, quizzes and exams that are examples on the following page.

Process and Criteria for Problem Solving:

The four steps listed in the sample problems below are the ones you should use for solving/answering all questions and problems. Even for questions that do not use calculations, looking at the information given, information you know already, and what the question asks, will assist you in getting the correct answer. The answers are the ultimate grade for the problem. Partial credit on exams, quizzes etc. will be based on your showing all work in the format listed below.

Problem 1: The density of a metal is 8.12 g/cm3. If the sample of metal is a sphere with a radius of 0.50 cm, calculate the mass of the spherical sample.

1. Write down the specific information needed when the problem is solved. Include units.

mass of sample = ? g

2. Write down the information you are given, labeling variables with units. Also include all information that would be useful you may know or can look up.

Density=8.12 g/mL or 8.12g= 1mL; r= 0.500 cm; Vsphere= 4/3 p r3; 1 cm3= 1mL

D=mass/vol.

3. Diagram a process for solving the problem. (Pathway)

use r —> vol sphere—> Dxvol —> mass

4. Do the calculations making sure you end up with the units you want. Use the correct number of significant figures in your answer

V= 4/3 p (0.500 cm)3= 0.523 cm3= 0.523 mL

8.12 g x 0.523 mL = 4.25 g

1 mL

Below are links to other Pages

Robin Terjeson's
Home Page		 Chemistry Department Clark College Chemistry Club Chemistry Web Sites

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Updated Jan. 3, 2004. Questions or comments on this Web site should go to Robin Terjeson.