Extraction Lab

Experiment 2: Extraction – Evaluation Summary

Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references.
** Deductions for hand written report/structures and exceeding page limit **

Report Breakdown Data/Results: _________________ /10

Discussion: _________________ /10

Report Total: _________________ /20

Other Lab Marks Performance: _________________ /6

Prelab Quiz: _________________ /3

TA Comments on Report/Performance

Report assessment
TA (name):
TA (signature):

Performance assessment
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Experiment 2: Extraction – Report Sheet

Data: 10 marks

Mass ground nutmeg used: 5.00g
Theoretical mass of trimyristin: 1.3g
(Show calculations)

MP: 56 – 57 C

Appearance of ground nutmeg: dry, brown, fine, fragrant powder

Table 1. Results – Data

Crude Trimyristin
Purified Trimyristin
Yield (g)
2.12g
0.06g
Yield (%)
170%
5%
Appearance
yellow translucent viscous liquid pale yellow fine powder
Melting Point

49-51 C
Recovery (%)

3%

Discussion Questions: 10 marks

1. Draw glycerol and myristic acid. Is trimyristin a simple or complex triglyceride?

Trimyristin is a simple triglyceride because it has the same one type of fatty acid (myristic acid) in all three positions linking to the glycerol molecule.

2. Trimyristin is soluble in ether and insoluble in acetone. Which part of the lipid molecule is responsible for this physical property, the glycerol or the fatty acid? Explain the observed solubility properties of trimyristin.

The fatty acids are responsible for its solubility in ether and insolubility in acetone. The fatty acids are long non-polar hydrophobic carbon chains and can only dissolve in other non-polar solvent like diethyl ether because