Chromatography Lab, Day 2

Today we took measurements and calculated Rf for our pigments. Lab books were turned back in at the end of class.

Reminder! There is a WebAssign up that’s due next Tuesday! You can do questions 4, 5,  and 8 now based on what we have covered in class so far. The remainder of the assignment will be based on what we discuss over the next few days.

Unit 2 test on Wednesday 10/7!

Chromatography Lab

Did a paper chromatography lab with common food colorings – although some teams got fun neon colors! Today we performed the experiment and left the strips to dry overnight; tomorrow we will take measurements and complete the lab analysis. The lab will be due at the end of the period tomorrow.

How Big is a Molecule Part Deux

Worked on Molecule lab calculations in class today – whatever didn’t get completed is due tomorrow!

Tips to remember:

• Be sure to note what kind of graduated cylinder you used, we have 2 different kinds and they have different precision!
• Use your scientific notation function on your calculator (EE or EXP button)…or you’ll end up with the wrong answers!

REMINDER! Formal lab report for Aluminum Foil lab due tomorrow!

How Big is a Molecule?

Today we did the “How Big is a Molecule” lab. We will have time to work on calculations in class tomorrow; whatever isn’t completed will be due Friday.

**Don’t forget! FORMAL typed lab report for Aluminum Foil lab due Friday as well!!