exams_Study_Guide_for_Exam_1 - pg 577 Acid Base extraction...

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CHEM 241 EXAM #1 STUDY GUIDE. The exam will be on Monday, July 24 th 1:10-2:10, Bagley 261 . This will be a closed book/note test. There will be a seating chart. There is a sample chem 241 exam posted on the web site and course bulletin board. The exam will be cover Recrystallization, Acid/Base extraction, Distillation & Gas Chromatography and. There will be no questions on the bromination lab or TLC (PLKE exp #15) The exam will be based on the lecture material and sections of the lab text listed below. Recrystallization : Know the basic parameters of choosing a good solvent (soluble hot, insoluble cold). Be able to interpret a solubility vs temp graph such as fig 5.1 on pg 559 of PLKE. Know what conditions that you can carry out a recrystallziation (must be solid and not having over 20% impurity, use minimal amount of solvent, cool down slowly). Know how to do the pre-lab calculation given temp vs solubility data as on pg 62. Review technique 5 sections 5.1 5.2, 5.5 5.9. Also understand the principle of melting point depression (section 6.2 and 6.3 starting on
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Unformatted text preview: pg 577). Acid Base extraction : Know basic solubility ideas about extraction (conversion of organic compounds to organic water soluble salts.) Know basic ideas about solubility (“like dissolves like”) Know the structure of the compounds that you worked with in this lab—and know what they would look like under acid and basic conditions. Be able to draw a flow chart as on pg 613 of your text (if you were given 3 compounds could you draw a flow chart to separate them). Distillation: Know the basic idea of distillation theory. Be able to determine the boiling point of a given mixture (i.e. a 50/50 mixture of toluene and hexane). Be able to understand a ‘temp vs volume distilled’ graph. Know the difference between a simple and fractional distillation and the definition of a “theoretical plate” Be able to interpret a GC trace. See the sample exam to get an idea of the questions to be asked....
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This note was uploaded on 06/30/2008 for the course CHEM 241 taught by Professor Unsure during the Spring '06 term at University of Washington.

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