[Prep Lab Students] Autumn 2025- Week 5

[Weaver, Tyler]

The Weekly Mix
Volume: Autumn 2025 | Edition: Week 5
Schedule

Time flies when you’re having fun! Here’s what we have planned for next week:

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Experimental Details

Review the window notes for additional details.

Please see the Week 4 edition<https://lists.osu.edu/mailman/private/preplabstudents/2025-September/000296.html> for details on MSR and FPD.
PPG

When doing cart checks for this experiment, swap the entire bucket of reagents regardless of fill level. Do not check individual bottles- it’ll take too long.

PbI

We’ll be using the vacuum ports for this experiment; the TAs do not need to do anything with the vacuum pump. We will also be using the ovens; they open by pulling the bottom of the handle up towards the ceiling- no rotating required.

BAR

The spectrometers use the same power cord as the hot plates. There is a “broken UV-Vis” cart in the window. Please place any broken UV-Vis on this cart immediately as they are reported. As always with anything broken, please put a broken item sticker on it describing the issue. When doing the cart check for this experiment, please swap all allura red bottles. We can check and refill them down in the lab.

SYN Day 2

Concentrated phosphoric acid is used for Day 2 and will be provided in Hood A.  Any questions you cannot answer for this experiment should be directed to Tyler.

XUF Day 1

Students will not be running XRF analysis on their pennies (as indicated in the lab manual). Instead, XRF results are on the sticker attached to each bagged penny. Hazardous gas will be produced when the penny dissolves. If the exhaust stops working the lab room and the neighboring room must be evacuated.

General Information

Checklists

Checklists and forms should be taken with you when completing a task. These are used to help you remember to complete all necessary components. Anyone completing a Lab Readiness Check should be verifying that the correct cart is in the front of the room. This should be easy if you have prepared your checklist and are using it.

Cart Checks & Refills

After completing a cart check, you should refill any non-full bottles you bring back down prior to putting them back on the shelf. The only time you should not refill containers is if you are told not to, or the stock carboy (or bottle) is empty.

Window Notes & Guides

You should review the window notes and equipment guides each time you are assigned a window shift. Things are being missed that were clearly presented in these guides.

Broken Pipet Pumps

We have a bin in the window for pipet pumps that are leaking and pipet pumps that have glass broken off in them. When they find their way to the window, please place them in the designated bin.

Collecting Abandoned Glassware

We didn’t really talk about this task during training, so we wanted to clarify our expectations. When completing this task, please put a tub on a cart and take it upstairs. Check in and around the sinks, the black trays, and the hoods for locker items that appear to be abandoned. There should be two large stir rods in HOOD B, one for each waste beaker. Bring the abandoned items back down to the lab, wash them, and then return them to the window on the floor you got them from. Please let us know if you have any questions.

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

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