[Prep Lab Students] Spring 2025- Week 11

[Weaver, Tyler]

Be sure you are reading the entirety of this email message. You are accountable for the entirety of all messages sent to you by the Prep Lab Staff. Emails sent to preplabstudents at lists.osu.edu<mailto:preplabstudents at lists.osu.edu> are archived for your convenience at https://lists.osu.edu/pipermail/preplabstudents/

Greetings!

We hope you had a safe and restful spring break. Time to jump back into it! The schedule for next week is below:

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

Please see the Week 9 email<https://lists.osu.edu/pipermail/preplabstudents/2025-March/000255.html> for notes on SGR and SST.

CAR
TAs will be picking up glucose test strips from the windows. These are light and moisture sensitive and are kept in the desiccators on the bench within the lab support window. To open the desiccator, unlatch the three latches and swing the door open. Do the reverse to close the desiccator.

The glucose test strips are expensive, so we WILL accept unused strips back. Please place these back into the desiccator in the pink “EXTRAS” bog. These should only be handed out if extras are needed. Never give a TA a partial set. They should be picking up a full class set at the beginning of the lab session.

IHT
Materials will be available on the reagent cart or on the bench beside hood A. Cups and lids will be in the red dispensers by the balances. We’re going to use quite a few weigh boats, cup and lids- so be sure to keep a close eye on these.

QUL
We’re expecting to go through more than 25,000 microcentrifuge tubes this week. All rooms have a significant stash of 1.7 mL microcentrifuge tubes behind their marker boards. The students will be using the centrifuges for this- if they report one is not working, check the following: it’s plugged in, turned on, and the lid is fully closed. If it still doesn’t work, trade it with one of the extras in the window. Place a broken item sticker on the faulty unit. When doing cart checks for this experiment, swap the entire bin of reagents regardless of fill level. Do not check individual bottles- it takes too long.

WST
This experiment will be done in pairs this semester and moving forward. pH meters and probes are still on the bench closest to Hood A.

There will be some rooms with a mix of old (black cable) and new (white cable) probes, and some rooms with only new (white cable) probes. The probes with the black cables will need to be attached to the top of the meters whereas the new probes will need to be attached to the probe and meter via the supplied white cables.

Connections are made on the top of the meter by pushing and turning. Both pH probe types will have either a black o-ring or blue rubber piece at the top of the probe shaft to cushion it from the glass storage tube and help seal in the storage solution. These should stay at the top of the probes while the students are taking readings.

If a student claims their pH meter is “broken”, they should have their TA try to calibrate it before bringing it to the window for an exchange. Emma has prepared a guide on how to handle pH meter issues. It will be available in the window for reference.

BAR
The spectrometers are behind the white boards in each room on both floors. They use the same power cord as the hot plates. Cuvettes and volumetric flasks will be on the bench next to Hood A. These items should be returned after use. Be prepared to replace volumetric flasks, they occasionally get broken. As a reminder, if any pipet pumps with glass stuck in them (or “leaky” pipet pumps) are returned to the window, please put them in the appropriate labeled bin. Emma and Sarah will have a “broken UV-Vis” cart. Please place any broken UV-Vis on this cart. As always with anything broken, please put a broken item sticker on it.

BLP
There are three unknowns per TA: one green liquid in falcon tubes, packaged solids in a black bag, and packaged solids in a clear colorless bag. We have packed all of these into white “chicken” boxes. TAs just need a single box. They don’t have to return the emptied box- if they do, just make a stack of collapsed boxes. You’ll also be passing out printed copies of the BLP lab manual pages.

Other Important Information

Keyth 2.0 (FINALLY)
It’s taken more than a year, but Keyth 2.0 is here! Moving forward, we will use the gray key safe mounted on the wall. You will use your BuckID, instead of a PIN, to open the safe. To take a key: swipe your BuckID, once the green light beside the door turns on, lift the lever below the door handle and open the door. Locate the key you want, rotate the captured key counter-clockwise and pull it out. Close the door when you are done. To return the key: swipe your ID, lift the lever, open the door. Insert the captured key (the one with the colored ring around it) and turn it clockwise to lock into place. If the key doesn’t turn, it’s likely in the wrong spot. If you need help, just ask!

Spent Daily Sheets
Please do not discard spent daily sheets. They should be given to a prep lab staff member or left on my table by Emma’s desk. I review all of these each day and archive any that need to be kept.

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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