Unformatted text preview: Chemistry 241
Lab 1 : Acid - Base Extraction , Crystallization , and Melting Point
2018 - 2019
LAB 1 : ACID- BASE EXTRACTION , CRYSTALLIZATION , AND MELTING
Prelab 1 & Checklist
Section : BU
Due on the FIRST day for this lab
DX Before lab , complete the General safety quiz on Canvas .
Before lab , complete the Lab 1 Day I safety quiz on Canvas .
* Bring all required lab supplies ( goggles , lab coat , lab notebook , ball - point pen ) .
* Before lab , read lab procedure and PLKE techniques 2 ( notebooks ) , 5 ( measurement ) , and 12
( extractions ) .
IX Watch the Canvas instructional video on extractions
[N) Arrive to lab on time .
[* Write a prelab for the extraction portion of the experiment in your lab notebook . Your prelab
the extraction .
should include a flow chart that details where each compound and solvent will be at each step in
Do You do NOT need to rewrite the same information in your notebook for each prelab . However ,
you should upload relevant notebook pages for BOTH prelabs .
( 3 pts ) The pKa of benzoic acid is 4 . 2 . Draw benzoic acid in the appropriate state (s ) of protonation at each
PH . In which layer ( water or organic ) would the benzoic acid be at each PH ?
PH 2. 0
PH 4. 2
PH 12. 0
Layer ( s ) Organ Z
Layer ( s ) Both
Layer ( s ) water...
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