Report
Evaluation
TOTAL
Chem 209 Lab Report
Experiment 1: Melting Point
Student Name______________
Date_____________
Student ID #_______________
Section___________
I-Purpose:
II-Table of Reagents:
Compound
Formula
M.Wt. (g/mol)
Melting point (ºC)
III-Results:
Compound
melting point (Trial 1)
(°C)
melting point (Trial 2)
(°C )
Unknown number
melting point (Trial 1)
(°C)
melting point (Trial 2)
(°C )
IV-Discussion of Results:
V-Answer to Questions:
1.
In winter, some people add salt upon snowing. Explain why?
2.
When mixing an unknown X with a known material A, if you get a sharp
melting point, can you conclude that both X and A are the same material?
3.
What influence on the determination of the melting point do the following
have:
(a) The thickness of the glass plates?
(b) The amount of sample?
(c) The rate of heating?
(d) The presence of insoluble impurity in the sample?
4.
Two students (A and B) took the data of the melting point for the mixture of
acetanilide and an unknown. "A" recorded the melting point as 100 –
C
and "B" recorded it as 95 –
C. What can you conclude about A and B's
mixtures?