[Preplabstudents] Autumn 2024- Week 11

[Weaver, Tyler]

Be sure you are reading the entirety of this email. You are accountable for the entirety of all email messages sent to you by the Prep Lab Staff.

Hi all,

Week 11 is up next!

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

SGR
The TAs will pick up candies from the window, these will be on the unknown shelf. Students will need to use the carboy of distilled water for this one- please check the level in the carboy when you are doing your readiness checks. If it looks like it’s getting low, let us know so we can replace it. If the students need to re-smash their candies, they can do so by gently tapping the candy with an iron ring while the candy is resting on a silicone trivet. Be prepared to pass out replacement 50-mL volumetric flasks.

QUL
We’re expecting to go through more than 90,000 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
Second week of pH meters! pH meters and probes are still 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 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 with the new replacement probe.

XUF Day 2
We will be moving a large instrument into Hood A of 350. A tank of acetylene will also be clamped to the bench near this hood. While the instrument is in this hood, the orange bucket will temporarily be placed under Hood A.

SYN Day 2
Be prepared to direct students to the ice machine outside of the restrooms. There is no scoop provided; students should just use an empty beaker from their drawer. Extra white pea size stir bars and vacuum tubing will be available in the window. Concentrated phosphoric acid is used for Day 2 and will be provided in Hood A. Each room will have a microscope. We will snag a tiny amount of sample from the first group to obtain crude product to put under the microscope. If the microscope says it’s not connected, you need to go into the tablet wifi settings and connect to the option that starts with M. If it asks for a password, it’s just 12345678. Any questions you cannot answer should be directed to me.

Other Important Information

Leaving Shifts Early

As a reminder, if you need to leave a shift early, you should speak with a prep lab staff member first. Please do not just head out after completing your last task.

Projector Remotes

All projector remotes (except 350) have been removed. Using the remotes can cause issues with the AV control panel. All computers have been set so their displays do not go to sleep. Each room should have a white page taped to the TA bench indicating how to use the AV control panel.

Lab Computers

IT will be wiping the files stored on the lab computers. This should free up memory in the machines allowing them to continue to update themselves, and hopefully resolve sign-in issues we’ve been seeing.

Keys

Please put keys back after you use them. I know we have airtags on them, and Keyth logs who takes them. But it’s still a pain when we must hunt them down. Especially when the person that took them out of keyth isn’t on the person that has them.

Happy Halloween! 🎃

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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