Texas A&M University Department of Chemistry primary mark

Organic Chemistry
Laboratory Program


Welcome to Organic Chemistry Laboratory I

Chemistry 237

Extraction


Lab Session Point Value:
  Download the
Lab Report Grading Breakdown
  Total Lab Report point value 35 points
  Quiz point value 27 points
 
Total Experiment Point Value 62 points
Quiz 5 Information:
  Experiments to study for the quiz:
 
  • Infrared Spectorscopy
  • Extraction
 
Quiz Scantron Requirements:
 
  • You will need a Scantron Form for all Quizzes!
  • The proper form is SC882-E (or equivalent). The forms are BLUE.
  • These forms are the ONLY forms that will be graded.
 
Quiz Keys:
 
  • The Quiz 5 Keys are answers only.
  • The paper copy of your quiz is located in the hall next to Rm 2203.
  • The quizzes are in folders labeled by Quiz Letter.
  • Please check the box before coming to the Office to ask for a copy.
Reading Assignments:
  Lab Manual Extraction (Techniques)
Recrystallization (Techniques)  
Extraction		 pp. 61-72
pp. 31-40
pp. 141-148
  McMurry Sections 2.7 - 2.11
Sections 20.2
Sections 24.2 - 24.4		 pp. 48-60
pp. 782-785
pp. 947-954  
Experimental Notes:
  • The purpose of this experiment is to demonstrate the use of the extraction technique as a method of separating and isolating mixtures of compounds. Many organic compounds have similar solubility profiles (high solubility in organic solvents and low solubility in water) and cannot be separated from each other directly by extraction. This experiment demonstrates the ability to use the acid-base properties of some compounds to change their solubility profiles.
  • Work alone. Each student will have an individual experimental set-up for this experiment.
  • Separate the benzoic acid and the benzocaine from the impure mixture by extraction. Store the recovered benzoic acid in your section's storage drawer until the next Lab Session for melting point and weight determination after they have dried.
Laboratory Questions:
  Download the Laboratory Questions here.
Additional Experimental Handouts:
  No additional handouts needed for this experiment.
Make-up Lab Information:
      — Click here.
The Lab Report Due Date:
      — Click here.

 
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