Organic Chemistry Laboratory Notebook Maintenance

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Organic Chemistry Laboratory Notebook Maintenance
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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!

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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
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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.
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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.

Chemical Name 1-butanol Sodium bromide 1-bromobutane
Molecular weight 74.12 mg/ mmol 102.894 mg/mmol 137.03 mg/ mmol
Mass 0.567 g 1.0 g 1.05 g
mmol 7.65 mmol 9.72 mmol 7.65 mmol
Equivalents 1 1.27 1
Density 0.81 g/ml   1.27 g/ml
volume 0.7 mL   0.827 mL
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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!

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Step 4 Finding Physical Data

• Can use one of two sites
• http//hazard.com/msds
• http//www.chemexper.com/

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Step 5Separation 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

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Step 5Separation Scheme
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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.

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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.

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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!

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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
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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.