Here is a list of topics for Exam One:
1. Scientific Method
2. Significant Figures (Counting, Operations, Rounding, Scientific Notation)
3. Metric System (milli, centi (with length), Kilo)
4. Conversions (Dimensional Analysis) – English to Metric, Metric to English, Metric to Metric
5. Temperature Conversions
6. Density Calculations, d=m/V and m=dV and V=m/d
7. Mass by difference, Volume by difference
8. Accuracy vs. Precision
9. Physical Changes vs. Chemical Changes
10. Element Symbols
11. Dalton’s Theory
12. Counting Atoms in Compounds e.g. (NH₄)₃PO₄ has 20 atoms, 3 Nitrogen atoms, 12 Hydrogen atoms, one Phosphorus atom and 4 Oxygen atoms.

The exam will be a mixture of mulitple choice questions, short answer, and problem solving. It will begin at 8:15 and end at approximately 9:30. Please email me if you have any questions.

Please print and be prepared to do two labs: Identification of an Unknown Metal and Single Displacement Reactions.

Here’s a video to enjoy: Exchange of Periodic Business Cards

Please bring your “Introductory Chemistry Modules” workbook to class every week from now on. Thanks.

This weekend the parking lot at the lake is NOT available for student/staff parking. Personally I’ve always been able to find parking within a few blocks of the college. Please plan accordingly.

Here are some notes on the first two quizzes to help you prepare:

Quiz One:
Covers the vocabulary of the scientific method – hypothesis, theory, law, data, qualitative, quantitative, experiment.

Covers significant figures: counting them, adding and subtracting and rounding the answer to the correct number of significant figures, muliplying and dividing and rounding to the correct number of significant figures.

Covers scientific notation: converting from decimal to scientific notation and from scientific notation to decimal.

Quiz Two:
Covers metric to metric conversions for liters, grams and meters using prefixes milli, centi and Kilo.

Covers short conversions from English to metric and metric to English using given conversion factors. Example: How many grams are equivalent to 135 lbs if 454g = 1.00 lb.

Covers temperature converstions Celsius to Fahrenheit and Fahrenheit to Celsius.

Covers the calculation of density given mass and volume. Example:
A graduated cylinder is filled with water to the 20.0mL mark. A metal object with a mass of 18.0 grams is dropped into the water and the water level rises to 21.6. What is the density of the metal?

Answer: Subtract 21.6 – 20.0 to obtain a volume of 1.6 mL (2 sig figs).
Divide 18.0 grams / 1.6 mL to obtain a density of 11g/mL (rounded to 2 sig figs).

Additional vocabulary includes accuracy vs. precision, mass vs. weight, and matter (Matter is anything that has mass and occupies space.)

One fact you should memorize is that one cubic centimeter equals one milliliter.

Please email me if you have any questions.

The quiz on Tuesday will cover chapter 18 through section 18.5 and the Henderson-Hasselbalch Equation. Laboratory Notebooks will be collected and graded on October 5th AFTER the laboratory is finished (at the end of class). The first exam will be given September 30th. All relevant homework will be due on that day. Homework will be checked and returned after the exam so you can hand in individual sheets or a notebook or whatever is easiest but PLEASE keep homework assignments in order and label them well.

Homework for Chapter 19 will be added to the homework list but so you have is right away it is:

10,14,18,22,28,32,36,46,48,58,60,72,78,80,104,121

This coming Sunday we will spend some time getting to know the elements of the periodic table. You have selected an element – now you need to make 35 copies of a “business card” for your element. Using this template or any design you wish (but keeping the size of your card exactly the size of a standard business card (2 in. X 3.5 in.) you need to design a promotional card for your element with the following information: name of the element, symbol and atomic number of the element, a single interesting fact about the element that makes it special, and a tag line – a clever comment about your element that would help your fellow students remember your element and its symbol.

We will be having an exchange of cards and you will receive a card from every student – so you will have a lovely set of flash cards to help you learn the elements and their names.

Please come to class prepared to do the following laboratories:
Separation of Salt and Sand
Identification of an Unknown Metal

also please print the lab: Chocolate Mousse but there is no preparation for this lab.

I look forward to seeing you all again for more fun learning Chemistry.

Please take a look at this article honoring Dr. Kelsey who was responsible for stopping the use of thalidomide in the USA saving untold numbers of enfants and who discovered diethylene glycol in elixir sulfanilamide which killed 107 people in the 1930s. The F.D.A. will be giving an annual award, the Kelsey award, to a member of the F.D.A. staff.

For extra credit (worth at least the value of 1/2 of a lab) please visit this link:

http://www.chm.davidson.edu/vce/spectrophotometry/index.html

and go though all of the spectrophotometry experiments. Turn in the data and calculations and a brief evaluation of the simulated laboratories. In your evaluation answer these questions:

1. Do these simulated exercises help you understand Beer’s Law?
2. If you had completed these simulated exercises prior to the lab we did today do you think you would have been better prepared?
3. Is the difficulty level appropriate for Chemistry 203?

This extra credit needs to be completed and turned in by the date of the first exam.

I hope you all enjoyed your first Chemistry class. I have two files for you to download and each file is available in two formats:

• Class Flour Measurement Data xls | pdf
• Class Water Measurement Data xls | pdf

To finish this lab in your laboratory notebook you need to analyze and comment on the data in these files as we discussed in class. Basically this means writing a paragraph in your laboratory notebook about any patterns, trends, insights, etc. you gain from looking at this data.

In addition I also have a checklist for you to help you prepare for next Sunday.

Before coming to class please do the following:

• Read Chapter One and Two in the text book.
• Log in and find the homework assignments handout under handouts. Do Chapter One and as much of Chapter Two as you can.
• Read the article: Introduction to the Scientific Method by Frank Wolfs (also under handouts)
• Do the following drill sheets: Counting Sig. Figs., Metric to Metric (under drills)
• Print the following laboratories: Temperature, Density (under laboratory)

If you have trouble understanding any of these tasks just ask!

See you on Sunday.