Question
1. What are the two effects of impurities on the melting point of an organic compound? 2. Why is it important to a) Pack the
1. What are the two effects of impurities on the melting point of an organic compound?
2. Why is it important to
a) Pack the sample as tightly as possible in the melting point tube?
b) Heat the sample slowly as the melting point is approached?
3. What is the effect of using too large a sample for determining melting point?
4. An unknown, pure sample of an organic solid is known to be one of the following:
Vanillin, melting point 81-82oC
Acetanilide, melting point 113-114oC Benzoic Acid, melting point 121-122oC
Urea, melting point 132-133oC
The unknown sample was mixed with a pure sample of each of these and the following observations were made
Unknown + Vanillin, melting point 80-81oC
Unknown + Acetanilide, melting point 85-93oC
Unknown + Benzoic Acid, melting point 98-112oC
Unknown + Urea, melting point 105-123oC
Identify the unknown substance and give your reasoning.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started
Organic Chemistry
Authors: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
8th Edition
1305580354, 978-1305580350
