[Prep Lab Students] Spring 2025- Week 3

[Weaver, Tyler]

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Howdy Y’all!

Week three is up next. Note that Monday is a University holiday, so Mondays will be one week behind for the rest of the semester. Considering last week was the first week of lab, things went pretty well!

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Experiment Notes-Refer to the window notes and gather sheets for additional details.

DAG
Materials will be provided on the bench beside Hood A. Be prepared to provide replacement plastic 50 mL graduated cylinders. The students tend to put these in their drawers instead of returning them. There are now enough brass pieces of each type for each student to have one. Extras are in the window.

MSR
Be prepared to direct students to the window cart for replacement pipets, beakers, and pipet pumps. Restock the cart frequently. Burets are in the back of the window. We have a bin for broken burets, in some cases we can salvage them. (List price is ~$200 per buret)Please keep any pipet pumps that have broken off pipets in them, or are leaking- we may be able to salvage them.

CPC
The distillation apparatus needs to be unplugged when not in use. Ideally, the water pump and heating mantle should be plugged in and turned on about 10-15 minutes before the lab session starts. The apparatus needs to be checked at least every 30 minutes by someone from the lab support window. Set a timer for 30 minutes to remind yourselves. This video<https://www.youtube.com/watch?v=a8J57oDHy_I> shows how to add ice and transfer water from the receiving flask to the heating flask (still pot) properly. You must watch this video prior to the start of CPC. Remember that both tubes (from the condenser and to the condenser) should be inside the bucket.

If you need to stop heating the flask for any reason, turn the heating mantle off and lower it away from the flask. This is why we set them up so high- it makes it easy to kill the heat quickly.

SOL
Keep an eye on the 25 mL test tubes and weigh boats during your lab readiness checks. These items will likely need to be restocked throughout the week. Replacements are available behind the white boards.

LCP
Students will be using ice toward the end of lab. We do not provide scoops for ice, instead student should use an empty beaker from their drawer. Students will not be provided with salt for their ice baths. Keep a close eye on the 25-mL test tubes. If they need refilled, more are available behind the marker boards.

Other Important Information

“THE Windex” (Window Index)
Emma has created an index listing the shelf or drawer position for everything that is in the window. This is another resource for you to use when you need to find something. This will be updated as needed.

Heaters
Turn heaters in the prep lab office and lab support windows off at the end of the day. If they keep getting left on, we will take them away. You should also be able to adjust the temp on the thermostat in most rooms. Heaters in the walls and stairwells do not belong to gen chem, and should not be messed with.

Blue Barrels
If a barrel is full let one of the prep lab staff know and we’ll help get it sealed up and swapped. Don’t overfill them please. Stop when we reach the bottom of the upper ring.

Lab Readiness Checks
During your check, please look at the solids used for SOL. If the jar is pretty much empty, please swap it out. These don’t get emptied very quickly, so it doesn’t make sense to cart check them. Let’s try this method and see how it goes.

Best,
Tyler

[The Ohio State University]

Tyler Weaver
Instructional Lab Supervisor
General Chemistry Prep Lab Manager

The Ohio State University
Department of Chemistry and Biochemistry
280E Celeste Lab
120 W. 18th Ave., Columbus, OH 43210
(614) 688-3929 Office
weaver.646 at osu.edu<mailto:weaver.646 at osu.edu>

Pronouns: he/him/his

Please do not feel obliged to read or reply to my messages outside of your normal working hours.
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