[Preplabstudents] Autumn 2024- Week 14

[Weaver, Tyler]

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Hi there,

Week 14 starts tomorrow, and it’s our last full week of lab! We’ll be finishing up AAP, GAS, BLP, and SAT on Monday and Tuesday. We’ll start make-up labs on Wednesday. 1220 will be doing two make-up labs: students that missed BLP will be doing BLP, all other 1220 make-ups will be pKa.

Below are the make-up numbers as of Sunday 11/17. I would expect these to go up.
1110: 55, 1210: 284, 1220: 123, 1220 BLP: 6, 1610: 13, 1910H: 4

[cid:image001.png at 01DB38F4.D3BE4780]

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

MSR
Be prepared to direct students to the window cart for replacement pipets, beakers, burets, and pipet pumps. Restock the window carts frequently. Burets are in the back of the window. We have a bin for broken burets, in some cases we can salvage them. (List price is ~$200 per buret) Please keep any pipet pumps that are “leaky” or have broken off pipets in them- we should be able to salvage them.

SCM
Be prepared to direct students to the window cart for replacement pipets, beakers, burets, and pipet pumps. Restock the window carts frequently. Burets are in the back of the window. We have a bin for broken burets, in some cases we can salvage them. (List price is ~$200 per buret) Please keep any pipet pumps that are “leaky” or have broken off pipets in them- we should be able to salvage them.

pKa
pH meters and probes will be on the bench closest to Hood A. There will be some rooms with a mix of old (black wire) and new (white wire) probes, and some rooms with only new (white wire) probes. The probes with the black wires will need to be attached to the top of the meters whereas the new probes will need to be attached to the white cables that are already on the meters.

The new probes will easily screw onto the cable (the other end is already connected to the meter), but the students may have issues with connecting the old cables to the meters. The black wires are attached to the top of the meter by pushing and turning. Both pH probes will have either a black o-ring (old) or a blue rubber o-ring (new) at the top of the probe to cushion it from the glass storage tube and help seal in the storage solution. These o-rings can stay at the top of the probes while the students are taking readings. The students should only remove the probe from the storage rack, not the tube. Students should replace the probe into a test tube filled with storage solution when done. Probe tips should not be allowed to dry out.

For spare meter or probe supplies, the 2nd floor window will have a mobile cabinet in it. The cabinet contains extra black and blue o-rings, storage solution, fill solution for inside the old probes, extra new probes, new cables, and a "broken" pH probe box.

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. “Broken” meters should be placed in the labeled bin so that one of the prep lab staff can check them and make any necessary repairs. If a student has a broken old probe, they will need to pick up a cable when obtaining a new replacement probe.

This experiment uses two unknown weak acid solutions. We will be providing these on the reagent carts. Signage above the shelf these are stored in will tell you what solution should be used to refill these bottles.

BLP
TAs will let you know how many students they have completing BLP. Please give them one Q tube, one R sample, one S sample, and one printed copy of BLP manual pages per student completing the BLP make-up. DO NOT GIVE OUT A WHOLE SET.

Other Important Information

Spring 2025
If you haven’t already done so, please get your schedule for spring submitted. If you know anyone who might be interested in joining our team, please share the application with them: go.osu.edu/sp25preplabapp.

End of Semester Party
We have scheduled our party on reading day, Thursday December 5th at 1:30 pm. Please join us for snacks, sweets, and jovial conversation. Carter may even make an appearance, no promises.

American Chemical Society Photographers
On Wednesday we will have a group of marketing people from the American Chemical Society in Celeste. They will be taking photos of our spaces while students are using them. In preparation for this, I have asked FOD to clean the windows and floors of the second-floor labs. We will use free time on Monday and Tuesday to make sure these rooms are ready to go.

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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