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Organic Chemistry Laboratory Notebook Maintenance

Organic Chemistry Laboratory Notebook Maintenance. Before coming to class…. Complete PRE-LAB assignment section of laboratory notebook. Remember, without a COMPLETE PRE-LAB assignment, you will not be allowed to do experiment!. Step 1: Complete Information at top of page.

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Organic Chemistry Laboratory Notebook Maintenance

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  1. Organic Chemistry Laboratory Notebook Maintenance

  2. Before coming to class… • Complete PRE-LAB assignment section of laboratory notebook. • Remember, without a COMPLETE PRE-LAB assignment, you will not be allowed to do experiment!

  3. Step 1:Complete Information at top of page Experiment title and number Date 1. Structure, Intermolecular Forces, and Solubility 8/8/12 Name Course Section Lab partner Jane Doe 231 M 11 Joe Doe Give lab day and time here

  4. Step 2:Objectives • Always include a header. • Give brief description of what you are attempting to do and how you are going to do it. OBJECTIVE: To investigate the relationship between molecular structure, intermolecular forces and solubility of various organic and aqueous solvents using solubility testing.

  5. Step 3:Chemical Reaction and Reaction Table • CH3CH2CH2CH2OH + NaBr H+→ CH3CH2CH2CH2Br + H2O • Do not write mechanism here • Some experiments do not call for the preparation of a compound. In those cases, you can skip to the next section.

  6. Step 4:Table of Physical Data • Prepare a single, organized table including physical constants and hazards for all chemicals in list as instructed. • Physical data is available from MSDS sheets! • WIKIPEDIA IS NOT AN ACCEPTABLE SOURCE!

  7. Step 4:Finding Physical Data • Can use one of two sites… • http://hazard.com/msds • http://www.chemexper.com/

  8. Step 5:Separation Scheme • Show, by means of a flow chart, how the desired product is to be separated from the reaction mixture (i.e. solvents, excess starting materials, and unwanted side products). • Be specific, but not overly detailed • Some experiments do not call for the separation or purification of a compound. In those cases, you can skip to the next section

  9. Step 5:Separation Scheme

  10. Step 6:Procedure • Write a concise version of the experimental procedure in your lab book (summarize) • Include sketches and label parts of any apparatus that is being used for the first time. • Do not spend too much time here.

  11. Step 7: Day of lab… • Your instructor will initial the pre-lab portion of your lab notebook prior to the lab briefing. • Without a COMPLETE pre-lab, you will NOT be allowed to perform the experiment.

  12. Step 8: During the lab… • write down any relevant observations that you make and any changes to the published material. • Write information down in blue or black ink directly in notebook as you do it, not after you leave the room!

  13. Step 8 Example: Data and Observations wt of salicylic acid + paper: 2.43 g wt of paper: 0.43 g salicylic acid: 2.00 g 1) On mixing, it took a few minutes for everything to go into solution. The addition of sulfuric acid caused some fizzing. 2) Heated for about 15 min instead of the planned 10 min. 3) After adding the water and cooling, no crystals appeared. On the suggestion of my Instructor, I scratched the flask with a glass rod, chilled it on ice for 10 more min, and finally a lot of slightly tan crystals appeared. 4) Quite a lot of solid, lightly tan, was collected on the filter paper 5) Let dry for 10 min. crude product + watchglass: 32.02 g watchglass: 30.10 g crude product: 1.92 g % yield of crude pr oduct: 1.92 g/2.52 g = 76%

  14. Step 8: After the lab… • Remove the YELLOW lab notebook pages containing all pre-lab and in-lab entries for the experiment and attach them to your FINAL LAB REPORT for grading.

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