[Prep Lab Students] Spring 2026- Week 7

[Weaver, Tyler]

The Weekly Mix
Volume: Spring 2026 | Edition: Week 7
Schedule

We’re only 3 weeks away from spring break!

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Experimental Details

Review the window notes and any associated equipment guides for additional details. Please refer to the Week 6 Edition<https://lists.osu.edu/pipermail/preplabstudents/2026-February/000337.html> for details on MML and CLK.

STR
This is one of my favorites! Students should try to keep their samples under the snorkels as much as possible. This will help immensely with the odor in the room.
PbI

Solids will be passed out from the lab support window. 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.

LLT

Blue square carboys of 0.44 M NaOH will 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. Partially filled bottles of lemon and lime juice should be placed in the fridge. We will periodically combine these. When doing a gather, please check the fridge first for full bottles of lemon and lime juice. If you need more than what is available in the fridge, please grab new bottles from aisle 28. No partial bottles of lemon or lime juice should be left in aisle 28. Unopened bottles of lemon and lime juice from carts checks should be placed back on the shelf in aisle 28.

LCP

Students will be using ice toward the end of lab. We do not provide scoops for ice, instead students should use an empty beaker from their drawer. At least one glove should be removed when walking through the hallway. If students are in the hallway with two gloved hands, please gently ask them to remove one glove. Additional commentary is not necessary.

VOL

This one has A LOT of equipment and solutions. Students will be using the multimeter kits which are on the bench beside Hood A. If they report that one is not working properly, please just swap the broken part for one of the replacements in the window. Emma has made a guide on what to do with these. Please read it.

The provided electrode kit is to be used for both Parts A and B. One magnetic stir bar is provided in the kit to help distinguish between iron and zinc electrodes. The students will be sanding the oxidation layer off the electrodes with emery paper/cloth. This should be done on the provided cover stock; the cover stock should be placed on the provided black plastic tray. The whole sanding procedure should be done under a snorkel. Each room has been provided with 7 trays since they only have 7 snorkels. We will not provide more. Students should not be sanding directly on the lab bench. Doing this makes me sad :(

There’s a ton of waste for this experiment. Liquids should be discarded in the chemical waste beakers (white can). All rooms have a third white can under the hood. If you do a waste run and take three cans from one room, replace the third can that was taken from under the hood. Contaminated paper, including spent emery paper, should go in the blue bucket. Spent electrodes should be collected in the canister in the window. Spent porous cups and Pasteur pipets should be discarded in the orange bucket.
Other Information

Ethanol Spray in the Prep Lab

If you empty a bottle of ethanol spray in the prep la (usually from cleaning tubs) please replace it with a new bottle from the cabinet.

Lab Coats

If you haven’t replaced your lab coat in the last few weeks, please do so.

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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