Remember the 12:30 p.m. section will NOT meet on Friday, August 28th. The 8:30 a.m. section WILL meet on Friday.
Several TA's and I were discussing one of the questions on PS1 which asked whether dry ice is a homogeneous or heterogeneous mixture or a pure substance. Confusion seemed to arise if one thought of dry ice as a solid and a gas. Dry ice is a pure substance in two phases, it is not a heterogeneous mixture in two phases. A mixture (two or more components) in two phases is a heterogeneous mixture. Dry ice is a single substance.
The comment from the student in class on Wednesday about snow, that it forms around a dust/dirt particle makes it a heterogeneous mixture. Determining whether a particular substance is a solution, heterogeneous mixture or a pure substance can sometimes be very confusing. When you provide an answer it would be worthwhile explaining your reasoning.
Problem Set #2 is ready. Help yourself. It will be available from me in class Friday if you do not have a copy yet.
Be sure to purchase your laboratory manual this week!
Remember laboratories are meeting this week. If you missed laboratory last week you will need to view the safety videotape this week. This week is Check-in...do not lose your locker key!
I've got our second exam date changed to Wednesday, October 7, 1998 at 5:30 p.m. Please make a note of this.
Print your own copy of the CHEM 1215 Syllabus and General Information.
Do you have a copy of the latest Problem Set? Get one while they last!
Need a periodic table link? Check this one out. Oh...BTW please memorize the spelling of the first twenty elements in the periodic table, plus some of the common elements with atomic numbers greater than 20.
NanoWorld HomePage
NanoWorld Images (cool)
Problem Sets
Here are pdf versions of the problem sets. You will need a version of the Adobe Acrobat Reader to read/print these files.
Problem Set #1 (Due Wednesday, August 26, 1998)
Exams
Here are sample exams from a previous CHEM 1215 I taught.
- Exam I
- Exam II
- Exam III