Chemistry 103A; Sections 5, 6, 7, 8; Lecture 1; 21 Aug 00
Dr. Salzman
Chemistry 324
salzman@arizona.edu
www.chem.arizona.edu/~salzmanr
Review of Syllabus
Discussion sections are listed in the Syllabus
You can attend any discussion section if there is room.
Three midterm exams:
Exam 1, Friday, 22 Sep
Exam 2, Friday, 27 Oct
Exam 3, Wednesday, 6 Dec
Final, Wednesday, 13 Dec, 11:00
All exams are in this room (CBS 204).
Homework assignments will be announced in class and listed on our web site.
Homework will be turned in, graded, and returned to you.
Turn in homework in the appropriate box right outside the north exit to this room.
Homework will be returned in the boxes outside Chem 134.
Homework counts as one midterm exam.
Homework assignments will be posted on the web.
Letter grades: The total possible points in the course will be:
3 midterm exams 300
homework (as percent) 100
Final Exam 200
Total 600
Your course grade will depend entirely on your exam and homework scores.
I aim my exam averages at about 68%
The lowest A is usually about 88%
The lowest B is usually about 76 %
The lowest C is usually about 63%
The lowest D is usually about 52%
These "cut-offs" may go down, but they probably will not go up.
Solution keys to homework and exams will be posted in one of the glass cases across from Chem 110
Grading and/or totaling errors should be brought to me, but NOT RIGHT BEFORE LECTURE. Check the posted solution key before you bring it to me.
We will use WebCT to post your exam and homework scores and your final grade. Access WebCT at www.quiz.chem.arizona.edu. Check that your scores have been recorded correctly. You will get your user name and password in your lab section. (If you forget your user name and/or your password, or, if you are not in a chemistry laboratory course, you can obtain your user name and password at the Teaching Lab Office (TLO), CBS 201. You will need a picture ID.
Instructions for homework;
8.5 by 11 paper
One side of paper only
staple
show your work (No credit for bare numerical answer.)
Your name, problem set number, ID number, and date due
Due at or before noon on due date
NO LATE HOMEWORK ACCEPTED (sorry)
About the lectures:
We can't take roll.
I will use the text as an outline.
I plan to post reading assignments on the web.
I will not talk about everything you read in the text.
I will sometimes add information or details not in the text.
I plan to post these notes on my web site.
I will ask you to memorize some material (I will tell you as we go along.
Please read the "General Comments" section of your syllabus. It will tell you about my philosophy of education.
Chapter 1
Matter
"Stuff"
Matter has mass and occupies space. (Contrast to light.)
States of matter
Common states of matter on our planet
gas
liquid
solid
Most of the matter in the universe in NOT in one of these three states.
other states of matter
plasma
interfacial matter
neutron stars
white dwarf stars
black holes
Macroscopic matter and microscopic matter
Bulk matter and particle matter
We will refer bulk matter as "macroscopic" matter. A macroscopic sample of matter is one big enough to see and to handle. We will use the term "microscopic" (derived from the Greek word for "small") to describe the fundamental units of matter (atoms, molecules, electrons, etc.).
Classifications of matter (substances)
Mixtures
can be separated into component parts by physical means
most substances are mixtures
heterogeneous mixtures
mechanical separation, filtration, etc
homogeneous mixtures
fractional distillation, etc
Pure substances
compounds
can be separated into simpler substances by chemical means
elements
cannot be separated into simpler substances by any means.
91 elements occur naturally on earth
21 or so more have been made (synthesized) by nuclear reactions
A pure substance is either an element or a compound.