<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div style="background-color: rgb(187, 0, 0); padding: 20px;">
<div style="text-align: center; text-indent: 0px; font-family: Arial, sans-serif; font-size: 28px; color: rgb(246, 247, 248);">
<b>The Weekly Mix</b></div>
<div class="elementToProof" style="text-align: center; text-indent: 0px; font-family: Arial, sans-serif; font-size: 16px; color: rgb(246, 247, 248);">
Volume: Autumn 2025 | Edition: Week 10</div>
</div>
<div style="padding: 20px;">
<div style="margin-bottom: 25px;">
<h2 class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; margin-bottom: 10px; padding-bottom: 4px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: rgb(153, 153, 153); font-size: 18px; color: rgb(187, 0, 0);">
<span style="font-family: Arial, sans-serif;">Schedule</span></h2>
<p class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3;">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">Just in time for Halloween, we’ll begin using pH meters this week! How scary! Also, today is Jay’s birthday- so if you see him on Monday,
please wish him happy birthday.</span></p>
<div dir="ltr" class="elementToProof" style="text-align: center; text-indent: 0px; line-height: 1.3; margin-top: 16px; margin-bottom: 16px; font-family: Aptos; font-size: 16px; color: rgb(33, 33, 33);">
<img src="cid:B9C029AE-7054-45D3-B2EA-AEF138C799A6" alt="image.png" id="id-B9C029AE-7054-45D3-B2EA-AEF138C799A6" width="926" style="width: 926px; max-width: 100%;"></div>
</div>
<div style="margin-bottom: 25px;">
<h2 class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; margin-bottom: 10px; padding-bottom: 4px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: rgb(153, 153, 153); font-size: 18px; color: rgb(187, 0, 0);">
<span style="font-family: Arial, sans-serif;">Experimental Details</span></h2>
<p class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3;">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">Review the window notes and any associated equipment guides for additional details. Please see<a href="https://lists.osu.edu/pipermail/preplabstudents/2025-October/000310.html" data-outlook-id="a0f48349-d238-4a32-9194-e48b24b73e2e" style="margin-top: 0px; margin-bottom: 0px;"> the
Week 9 edition</a> for information on Experiments IHT and SAL.</span></p>
<div dir="ltr" class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; margin-top: 1em; margin-bottom: 1em; font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
<span style="background-color: rgb(255, 255, 255); line-height: 1.3;"><b>CAR</b></span></div>
<p class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3;">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">TAs will be picking up glucose test strips from the windows. These are light and moisture sensitive and are kept in the desiccators
on the bench within the lab support window. To open the desiccator, unlatch the three latches and swing the door open. Do the reverse to close the desiccator.</span><span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);"> </span></p>
<div style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
The glucose test strips are expensive, so we WILL accept unused strips back. Please place these back into the desiccator in the pink “EXTRAS” bog. These should only be handed out if extras are needed. Never give a TA a partial set. They should be picking up
a full class set at the beginning of the lab session.</div>
<p dir="ltr" class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);"><b>EMS</b></span></p>
<p class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">These will be set up on the bench beside Hood A. Replacement parts are available in the window. The power supplies and discharge tubes
are new, but the spectrometers are the same.</span></p>
<p dir="ltr" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);"><b>SST</b></span></p>
<p style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">If a lab indicates they don’t have enough meters and probes, be sure they are planning to work in pairs.
</span><span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">pH meters, probes, and cables to connect the two, are on the bench closest to Hood A.</span></p>
<div style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
There could be a few rooms with old (black cable) probes, most rooms will have new (white wire) probes. The probes with the black cables will need to be attached to the top of the meters whereas the new white wire probes will need to be attached to the probe
and meter via the white wire.</div>
<div dir="ltr" style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
<br>
</div>
<div style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
Connections are made on the top of the meter by pushing and turning (BNC type). 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.</div>
<div style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
</div>
<div style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
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, please review it. It will be available in the window.</div>
<p dir="ltr" class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); line-height: 1.3;"><b>XUF Day 1</b></span></p>
<p style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255);">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">Students will NOT be running XRF analysis on their pennies. Instead, XRF results are on the sticker attached to each bagged penny. Hazardous
gas will be produced when the penny dissolves. If the exhaust stops working the lab room and the neighboring room must be evacuated. </span></p>
<div style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255); margin-top: 1em; margin-bottom: 1em; font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51);">
<span style="background-color: rgb(255, 255, 255);"><b>SYN Day 1</b></span></div>
<p class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3;">
<span style="font-family: Arial, sans-serif; font-size: 15px; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">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. Emma, Sarah, and/or Tyler will manage the microwave. Note that concentrated phosphoric acid is
<i>not</i> needed for Day 1 and will not be provided. 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 students observe the temperature on the digital readout
going down as they heat up their melting point apparatus, they plugged the thermocouple in the wrong way. They just need to remove it, turn it 180˚ and reinsert it. Replacement thermocouples will also be available in the window. Each room is limited to only
6 groups due to the layout in the microwave. If a room asks for more reaction tubes, please check they don’t have more than 6 groups before handing anything out. Any questions you cannot answer should be directed to Tyler.</span></p>
</div>
<div style="margin-bottom: 25px;">
<h2 class="elementToProof" style="text-align: left; text-indent: 0px; line-height: 1.3; margin-bottom: 10px; padding-bottom: 4px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: rgb(153, 153, 153); font-size: 18px; color: rgb(187, 0, 0);">
<span style="font-family: Arial, sans-serif;">Other Information</span></h2>
<p dir="ltr" class="MsoNormal" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255); margin: 0in;">
<span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);"><b>Shift Switches</b></span></p>
<div dir="ltr" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255); margin: 0in; font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51);">
<span style="background-color: rgb(255, 255, 255);"><b><br>
</b></span></div>
<p class="MsoNormal" style="text-align: left; text-indent: 0px; margin: 0in;"><span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">We understand that sometimes you’ll need to miss a
shift for a planned schedule conflict. If this happens, please first message the GroupMe to see if anyone can cover your shift. Hopefully, someone is willing to do so. It is common to not get a response if you ask about shifts in the distant future. We recommend
asking about a week out. Once you have someone to cover your shift, you must send an email to
</span><span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(150, 96, 125); background-color: rgb(255, 255, 255);"><a href="mailto:preplabstaff@lists.osu.edu" title="mailto:preplabstaff@lists.osu.edu" data-outlook-id="f24b9b2b-8428-4165-ad73-270b924e5b80" style="color: rgb(150, 96, 125); margin-top: 0px; margin-bottom: 0px;">preplabstaff@lists.osu.edu</a></span><span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);"> to
notify us of the switch. You should cc the person that is covering your shift to keep them in the loop. While we do keep an eye on the GroupMe messages; unless you email us, the switch is not official.</span></p>
<div dir="ltr" style="text-align: left; text-indent: 0px; margin: 0in; font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51);">
<span style="background-color: rgb(255, 255, 255);"><br>
</span></div>
<p dir="ltr" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255); margin: 0in;">
<span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);"><b>Reagent Requests</b></span></p>
<div dir="ltr" style="text-align: left; text-indent: 0px; line-height: 1.3; background-color: rgb(255, 255, 255); margin: 0in; font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51);">
<span style="background-color: rgb(255, 255, 255);"><b><br>
</b></span></div>
<p style="text-align: left; text-indent: 0px; background-color: rgb(255, 255, 255); margin: 0in;">
<span style="font-family: Arial, sans-serif; font-size: 11.25pt; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255);">When someone requests a reagent from the window, be sure to find out what room they are from, what concentration is needed, and what
size container is needed. Some experiments use the same reagent in different concentrations or bottle sizes. Having this info will make it easier for us to respond to the request quickly.</span></p>
</div>
</div>
<div class="elementToProof" style="text-align: center; text-indent: 0px; background-color: rgb(240, 240, 240); padding: 15px; font-family: Arial, sans-serif; font-size: 12px;">
<span style="color: rgb(102, 102, 102);">General Chemistry Prep Lab • Department of Chemistry and Biochemistry • THE Ohio State University<br>
</span><span style="color: rgb(0, 120, 212);"><a href="mailto:preplabstaff@lists.osu.edu" id="OWA7fc7fa66-2949-53c8-c84a-7dc115d3ebed" class="ms-outlook-linkify OWAAutoLink" title="mailto:preplabstaff@lists.osu.edu" data-outlook-id="221d003b-decd-4644-9507-88c749f7696a" style="color: rgb(0, 120, 212);">preplabstaff@lists.osu.edu</a></span></div>
<div dir="ltr" style="text-align: left; text-indent: 0px; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 9pt; color: rgb(0, 0, 0);">
<span style="font-family: "Buckeye Sans 2"; color: rgb(201, 27, 0);"><i>Be sure you are reading the entirety of this email message. You are accountable for the entirety of all messages sent to you by the Prep Lab Staff. Emails sent to
</i></span><span style="font-family: Aptos, sans-serif; color: rgb(0, 120, 212);"><i><u><a href="mailto:preplabstudents@lists.osu.edu" title="mailto:preplabstudents@lists.osu.edu" data-outlook-id="3f9e6c1b-8d88-4056-b5a1-7793f41c60d2" style="color: rgb(0, 120, 212);">preplabstudents@lists.osu.edu</a></u></i></span><span style="font-family: "Buckeye Sans 2"; color: rgb(201, 27, 0);"><i> are
archived for your convenience at </i></span><span style="font-family: Aptos, sans-serif; color: rgb(0, 120, 212);"><i><u><a href="https://lists.osu.edu/pipermail/preplabstudents/" title="https://lists.osu.edu/pipermail/preplabstudents/" data-outlook-id="1766334a-fda4-4ab3-84be-b433a7aa98b3" style="color: rgb(0, 120, 212);">https://lists.osu.edu/pipermail/preplabstudents/</a></u></i></span></div>
<div dir="ltr" style="font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div dir="ltr" id="ms-outlook-mobile-signature"></div>
</body>
</html>