Cesium 2013

Not much, mostly studying/review. For those w/o the Lab Manuals, I copied (most of) it in this post.

CHEMISTRY
Probset due tomorrow.
Experiment tomorrow, bring lab gown, goggles.
Make a pre-lab in your filler for Experiment #16: Diffusion of Gases. The procedure is in your Chemistry and Technology Laboratory Manual (the thin green one).
For those who can't find their copy or are too lazy to borrow one:
SAFETY:
1.) Take note of the proper handling and disposal of acids, especially concentrated acid.
2.) Concentrated HCl and concentrated NH₃ are corrosive. Avoid skin contact. Avoid the inhalation of fumes. Wash your hands after use.
PROCEDURE:

1. Fit the cotton plugs snugly into the ends of the clean, dry glass tube.
2. Close each end loosely with a rubber stopper or cork.
3. Place the tube on a dark background
4. Remove the stoppers from the diffusion tube and using two medicine droppers, simultaneously add 5 drops of concentrated HCl to the cotton used at one end of the tube. Immediately replace the stoppers. Refer to Figure 16.
5. As soon as a white deposit appears in the tube, record the time in the data table.
6. Measure the distances in cm from the inside end of each cotton plug to the center of the white deposit. These are the distances traveled by the HCl and NH₃ molecules.