[Prep Lab Students] Spring 2025- Week 5

[Weaver, Tyler]

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Greetings!

Week 5 is up next! One more day of FPD and then it’s 1210’s turn to use the ice machines for PbI. The schedule for this week is below.

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

Please see the Week 4 email<https://lists.osu.edu/pipermail/preplabstudents/2025-January/000244.html> for info on SHM and FPD.

MML/MGB
Model kits will be provided on the bench beside Hood A. Sarah and Emma have replacement parts in both windows if needed.

PbI
Solid reagents will be handed out from the lab support windows. These are provided in class sets and should be picked up by the TA before lab starts. Do not give out partial sets at the start of lab. We’ll be using the vacuum ports for this experiment; the TAs do not need to do anything with the vacuum pump. Be sure the vacuum control knob in the second-floor window (by the fire extinguisher) is in the “auto” position We will also be using the ovens; they open by pulling the bottom of the handle up towards the ceiling- no rotating required. We strongly encourage TAs and students to keep the oven doors closed as much as possible. This helps with heat loss. When doing lab readiness checks, please verify that a box of P5 filter paper is present on the reagent cart. If not, grab one from the window.

BAR
We will be using the new spectrometers for this experiment. 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.

LLT
Be prepared to hand out burets, pipets, pipet pumps, and blue stoppers. All of these items are available on the window cart. Please refill the window cart when things start to get low- this goes for all items on the window cart, not just the items being used for LLT. The 0.44 M NaOH carboy should be kept on the special carboy spill tray. Blue square carboys of 0.44 M NaOH should be swapped out during the lab readiness checks by those completing them. When swapping out the blue carboys, check the fill level of the spill tray. Let us know if it’s more than half full.

SST
This experiment will be done in pairs this semester and moving forward.

Students and pH meters don’t always get along. The lab supervisors and prep lab have made significant efforts to help this. pH meters, probes, and cables to connect the two, are on the bench closest to Hood A.

There will be some rooms with a mix of old (black cable) and new (white wire) 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 printed and laminated, but we have attached a draft to this email for convenience.

Other Important Information

Lightheaded Students & Fainting
It is policy in gen chem that if any student expresses concern about being lightheaded or fainting, or faints, 911 should be called. The student can refuse treatment and/or transportation once the paramedics arrive. We’ve seen several cases where a student has urged us not to call 911 but wound up being transported for their own benefit.

Check the Schedule on Teams
Please check your schedule on Teams and let me know of any mistakes. I’ve asked before, but we found a mistake this past Thursday.

SB104 & Single Occupancy Restrooms
This month, a new state law takes effect that requires OSU to “designate with clear signage each student restroom, locker room, changing room, or shower room accessible by multiple students at the same time for the exclusive use by students of the male biological sex only or by students of the female biological sex only.” Note that this law does not apply to single occupancy restrooms; anyone is welcome to use any available single occupancy restroom.

If you or any students wish to know where a single occupancy restroom might be available, please see this map<https://fod.osu.edu/restrooms-locker-rooms-and-changing>. Note that some of the single occupancy restrooms around CBC buildings are not yet included in this map, so a supplemental list is below:

South Campus
Parks Hall:  1st floor (100T); 2nd floor (224T), 3rd floor (324T)
BRT: 1st floor (121T, 123T, 155T); basement (021T; 023T)

North Campus
Celeste: 2nd floor (243T); 3rd floor (343T); 4th floor (443T)
CBEC: 1st floor (103T); 2nd floor (2 in tower); 3rd floor (2 in tower); 4th floor (2 in tower)
Fontana: 1st floor (1003T); 2nd floor (2151T)
Stillman: 2nd floor (219T)

Additional Unknown Requests
Only give out full sets of unknowns at the start of lab. If someone needs a single sample check the partial sets bin first. If what you need isn’t in there, break a set and put the remainder of the set in the partials bin.

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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