Distillation of a Liquid Mixture
Report
The lab report for this experiment consists of a form that you will input data into. The form is available on the Chem 201 Laboratory Moodle Course page. You and your lab partner will each submit your own report. All work including the tables and graph should be your own. All lab reports are due the week of September 30th, 2024 by noon on your respective lab day. Lab reports will be submitted to Moodle as PDF files.
You will also submit your lab notebook pages. These will be due following your lab section. Notebook scans will be submitted to Moodle as PDF files.
Interpreting IR Data
- For both experimental data and for predicted Spartan’20 data – Report absorbance maxima to the nearest cm-1, i.e., 1748.31 should be reported as 1748. Do not report the decimal points.
- Relative intensity – This is a qualitative assessment. Strong, medium, and weak bands should be labeled s, m, and w, respectively. If a band goes completely off-scale, label it very strong (vs). If it is barely visible, label it very weak (vw). The intensity is related to the polarity of the bond and/or the number of a specific type of bond.
- Shape – Most bands look normal, but if your band is exceptionally sharp, or broad, or W-shaped (the band appears to consist of two closely separated bands) this may help you distinguish one bond from another (e.g. an OH from an NH).
- Assignment – When discussing data, make one assignment for each absorbance maximum. If a vibration involves bond stretching (st.), draw the atoms and the bond type, e.g., C-O or C=O or O-H. If a vibration involves a bending motion (bd.), draw the 3-atom group, e.g., CH2 or COC.
Uploading Notebook Pages
Converting notebook pages into a PDF file can be accomplished in several different ways. The people at the CUS help desk will be glad to assist you (but don’t wait until the last minute – they are not miracle workers).
- Photocopiers on campus will scan any document (including pages from your notebook) and convert it into a PDF file. Use black-and-white, never color.
- You can use your phone to take pictures of your notebook pages. Email yourself the images and convert them into a PDF file. Make sure the photos are legible. If we can’t read it, it doesn’t exist for us (and there will be a grade to match).
- Adobe Acrobat (and probably several other programs in the ETC) will allow you to merge PDF pages and files from different sources. If you use Adobe Acrobat, a good ‘final’ step is to use Save As Other… Reduced Size PDF… Make compatible with Acrobat 10.0 and later. This will often make very large files, e.g., those generated by cameras and photocopiers much smaller.