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General Chemistry I

Homework, Handouts,
Practice Tests, Take-Home tests

Spring 2006: Instructor: Ken Costello
Room PS2S: Tue/Thur 7:30-8:45am

As a teacher, I like to think that my presentations are so good that you learn the topic right there in the classroom. However, this isn't usually true. Most likely you gain an awareness of the topic and, hopefully, I get you interested in the topic.

I also try to reinforce skills that will accelerate your learning, such as viewing chemistry as building blocks, force & energy, and mathematics.

I will also remind you to use learning skills and watch out for the barriers to learning.


The real learning comes from going over the material by yourself and making the knowledge your own. In other words, you need to rework it in a way that it becomes your knowledge, not mine.

For example, I go over the early uses of chemistry in class. You may start with what I've covered but then do some of your own research to find out more.

Another example could be my talk about the development of the Periodic Table of the Elements. You may then go to the textbook and/or Wikipedia and learn their view of the development of the Periodic Table. You will also find out there are different types of Periodic Tables. This reinforces what I presented but also gives you more depth and makes it your knowledge. You can learn more about it than what I know. I'm just a starting point for what you can learn.

Handout for Building Blocks (PowerPoint file)
Handout for Polyatomic Ions (PowerPoint file)
The first homework assignment replaces a presentation I usually do in class. Class time isn't enough to cover everything you need to cover to go on to CHM152. I have Web pages that do a good job in covering this presentation. This topic is broken down into six Web tutorials. The links to them are on my CHM107 home page. Scroll down and look for the "Chemistry's Big Picture: It's all about building blocks" These are tutorials 4, 5, 6, 7, 8, & 9. Go over them. The homework to turn in are the quizzes that go with tutorial 8 and tutorial 9. You can copy and paste the quiz questions from the Web page to your email and email them to me at costello@chemistryland.com. Or you can write or type your answers and give hand it in on paper. I don't have a due date for this assignment at this time.
Synthesis of Flavorings (PowerPoint file)

Homework Problems and Handouts for Stoichiometry

Homework: Page 99: Follow-up Problem 3.6
A dry-cleaning solvent has a molecular weight of 146.99 g/mole that contains C, H, and Cl. It is suspected to be a cancer-causing agent. When a 0.250g sample was studied by combustion analysis, 0.451 g of CO2 and 0.0617 g of H2O formed. Find the molecular formula.

Homework: Page 105: Follow-up Problem 3.7 (d) Write a balanced equation for this chemical statement.
Explosive decomposition of dynamite: liquid nitroglycerine (C3H5N3O9) explodes to produce a mixture of gases-carbon dioxide, water vapor, nitrogen, and oxygen.

Homework: Page 126, Problem 3.23: Cisplatin (Platinol) is a powerful drug used in the treatment of certain cancers. Calculate (a) the moles of compound in 285.3 g of Cisplatin. (x) If platinum is $47 per gram, what is the cost of platinum in this sample?
Handout: Download stoichiometry equation examples for hydrogen peroxide and cyanogen. (Excel spreadsheet) (PDF)
Homework: Stoichiometry problems 3.61 (pg 128) and 3.85 (pg 129) Optional download (Excel spreadsheet) (PDF)
Homework Practice Set: Stoichiometry across the Courses: This sheet has problems that span from CHM130, CHM151, CHM151LL, CHM152, & CHM325 (Analytical Chemistry). This set is on this Web page.
Blood Test Units Conversion Homework: Convert from Conventional Units to SI Units and reverse plus other chemistry units of concentration. 18 conversion problems found on this page.
Practice Test for In-class Exam on March 28th. The practice test is in PowerPoint format (411 Kbyte).
Homework: Pick and Choose 15 assignments from 25. The list is on this page.

Posters are commonly used at chemistry conferences to communitate the results of projects or research. It allows many people to present their material at the same time in an efficient amount of space. Learning how to do an effective poster is a valuable skill for many purposes.

The poster project is due April 27th. The topic is anything related to chemistry. Tips on designing a poster is found at this URL:


An easel or table will be provided for your poster.


Take-Home Test 2. This take home deals with metric sizes and calculations of dilutions, especially dilutions that use a mixture of concentration and volume units.

To download click here (234 k)

Take-Home Test 3. This test deals with colligative properties, specific heat with electrical energy calculations, gas stoichiometry problems, food energy, metric conversions, density. There's also problems dealing with acid-base reactions and stoichiometry calculations.

To download click here (565 k)

For tips for calculating molar mass for a gas, go here.
For calculating H+ moles per liter from pH just take the the negative value of the pH and make that the exponent of 10. The answer is moles per liter. Fo example, pH 0.6 is 10-0.6 or 0.25 moles per liter.


This PowerPoint is the study guide for part 1 of the final. The test is multiple choice. The study guide just goes over topics that is covered on the test.

Click to download (74k)

This PowerPoint is the study guide for part 2 of the final. It was passed out in class, but in case it is lost, you can download it here.

Click to download (978k)