[Prep Lab Students] Autumn 2025- Week 3

[Weaver, Tyler]

The Weekly Mix
Volume: Autumn 2025 | Edition: Week 3
Schedule

We made it through the first week of lab! This week is a full five days, here's what we have planned:

[image.png]
Experimental Details

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

Please see the Week 2 <https://lists.osu.edu/pipermail/preplabstudents/2025-September/000290.html> edition for details on WRM and INK.
MSR

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 in the designated bin- 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 shows how to add ice and transfer water from the receiving flask to the heating flask (still pot) properly<https://youtu.be/a8J57oDHy_I>. You must watch this video prior to the start of CPC. Remember the end of both pieces of tubing (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 easier to kill the heat quickly.

SOL

Keep an eye on the 15-mL tubes (green lid) and weigh boats. These items will likely need to be restocked throughout the week. Extra weigh boats are behind the boards. Extra 15-mL tubes are in the same cabinet as the cups and lids (under the balances, closest to Hood A). We’re going to be using vortex mixers for this experiment. These have been placed at each snorkel, so each room only has 7. They are touch activated, so pushing the capped tube on the inner cone starts the mixer. We may have a learning curve here. Please collect emptied green 15-mL falcon tube racks in the designated bin in the lab support window.

CDY

The TAs will pick up candies, which are on the unknown shelf. The students will need to use the carboy of distilled water for this one- please check the level in the carboy when you are doing your readiness checks. If it looks like it’s getting low, let us know. If you need a single candy, please check the “partial unknown sets” bin before breaking a whole set. Once broken, please place the broken set into the “partial unknown sets” bin.

General Information

GroupMe

When you are on the clock, you should be monitoring the GroupMe. When something is done, or will be done by you, please indicate that in the GroupMe.

Requests from Prep Lab Staff

I want to remind you that requests from my staff (Linda, MJ, Sarah, and Emma) carry the same weight as requests from me. We work as one team, and it’s important that you treat their instructions with the same priority and respect as if they came directly from me.

Gather Sheets

Please be sure you are leaving gather sheets with the associated gather. Once the cart check or cart change has been completed, you can throw the gather sheet away. We would prefer it doesn’t come in the office since it was with a tub full of chemicals.

Calling 911

We need to expand on our guidance for calling 911. Our new “always call 911” list now include seizures. So, if someone passes out, nearly passes out, or has a seizure you must call 911.

Spent Daily Sheets

At the end of the day, all spent daily sheets should be placed in the completed forms basket on top of the gather sheet cabinet. I review these and need to store certain parts of them for future reference. Please do not throw them away.

General Chemistry Prep Lab • Department of Chemistry and Biochemistry • THE Ohio State University
preplabstaff at lists.osu.edu<mailto:preplabstaff at lists.osu.edu>



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/preplabstudents/attachments/20250907/a554b30c/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 61890 bytes
Desc: image.png
URL: <http://lists.osu.edu/pipermail/preplabstudents/attachments/20250907/a554b30c/attachment-0001.png>