MELTING POINT (Lab #2)
Assumed Data/Results*
A. Literature Values (List of Melting Points of All Eight Knowns)
Name of Known
Phenylacetic
Naphthalene
Resorcinol
Toulic Acid
Urea
Phenacetin
Adipic Acid
Citric Acid
Literature Melting Point (°C)
77-78
80
109-110
110-112
133-134
134-135
151-153
153-153
B. Experimental Data Assume that you performed the experiment in the lab and obtained the following data/results for the knowns
and unknowns you studied:
(i) Knowns (selected knowns)
Group
1
2
2 Selected Knowns
> 20 °C Apart
Phenylacetic
Citric Acid
Phenacetin
Toulic Acid
Observed
M.P. (°C)
79
153
134
110
2 Selected Knowns
< 6 °C Apart
Phenylacetic
Naphthalene
Toulic Acid
Resorcinol
Observed
Mixed M.P. (°C)
55 - 64
78 - 89
(ii) Unknown
Group
Unknown #
Observed
M.P. (°C)
1
G1
134
2
G2
110
Possible
Identity
Urea
Phenacetin
Toulic acid
Resorcinol
Mixtures
G1 + Urea
G1 + Phenacetin
G2 + Toulic acid
G2 + Resorcinol
Observed
Mixed M.P. (°C)
110 - 120
134
110
70 - 81
C. Recommended online video for intro to concepts of the lab:
https://www.youtube.com/watch?v=zMjl9MzpySU
*Note: Since this experiment is not being done physically in the lab, the raw data and/or observations you would have obtained
in the lab is being provided to you. You would assume as if you obtained the data in the lab and use it to perform your
calculations, make discussions and draw conclusions. Since the data was not obtained by you in reality, you will not be graded
on how accurate the raw data is. You would be graded based on your skills and ability to follow instructions, organize/present
data, do calculations (& show any applicable reaction schemes), write discussions, draw logical conclusions based on the
results and write a proper/well-structured report.