[Prep Lab Students] Autumn 2025- Week 13

[Weaver, Tyler]

The Weekly Mix
Volume: Autumn 2025 | Edition: Week 13
Schedule

Lucky Week 13 is up next! Remember that new experiments will start on Wednesdays now.

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Experimental Details

Review the window notes and any associated equipment guides for additional details. Please the Week 12 edition<https://lists.osu.edu/pipermail/preplabstudents/2025-November/000313.html> for details on ECE, MGB, BLP, and HCAL.

NAP

This is a new one that Sarah has been working on. Students will be working in pairs or groups of three. Equipment needed will be on the bench beside hood A. We’ll be using vortex mixers, which are new to 1110. To activate the mixer, students just need to press their centrifuge tube down into the top cone. It will turn off when pressure is released. Waste is as expected, liquids and chemical solids go in the white can, rinsed plastic tubes in the blue bucket.

GAS

Each TA will pick up a large bag containing Alka-Seltzer, antacids, and small empty bags. It’s ok for students to ask for an additional package of Alka-Seltzer at the window for Part C. We’ve switched to generic Alka-Seltzer. Essentially, the white tablets are Alka-Seltzer and the colored tablets are antacid. Extra tubing for the gas collection apparatus will be available in the window. The barometers in each room are near the thermostat (on the same wall as hood B). There are extra ring stands in each room between the ADA sink and Hood A.

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). 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.

SAT

A carboy of saturated calcium hydroxide will be stirring on the bench beside Hood A. This should last all week, but MJ will have a backup ready in the prep lab just to be safe. Students will be gravity filtering solution through P4 filter paper and a long stem funnel. This is 1910’s first titration lab, be prepared to hand out burets, pipets, and pipet pumps.

Other Information
Spring 2026 Schedule

The spring 2026 schedule is now available in Teams. Please look at the week of January 5th. Remember, shifts must be two hours (four blocks) long, and you cannot have more than 8 hours (16 blocks) scheduled in a single day. Everyone is required to schedule at least 12 hours per week; exceptions must be approved my Tyler in advance. Note that we only have one night lab, on Tuesday, but it will use both floors.

Leaving the Prep Lab After this Semester?


If you know you know you are, or are considering, leaving the Prep Lab at the end of this semester, please let Tyler know ASAP.

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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