Homework Help: organic chem

Posted by vivian on Thursday, September 8, 2011 at 11:02pm.

An unknown compound melted at 131-133°C. It is thought to be one of the following compounds(mp,°C): trans-cinnamic acid (133-134); benzamide(128-130); DL-malic acid(131-133); or benzoin(135-137). The mixture melting points of the unknown compound with each of the test compounds are listed below. What is the unknown compound? Briefly explain your reasoning.

-trans-cinnamic acid...........110-120
-benzamide.....................130-132
-DL-malic acid..................114-124
-benzoin.........................108-116

organic chem - DrBob222, Friday, September 9, 2011 at 12:41am
With mixed melting points you look for the following two criteria:
1. A sharp melting point (for example 110-120 is not anywhere near what I would call sharp)
2. A melting point that is VERY close to the unmixed unknown.

Answer this Question

Related Questions

organic chemistry --please help me!!!!!!!!!!!!!!! - Calculate the theoretical ...
Chemistry - Suppose a student started with 133 mg of trans-cinnamic acid and 0....
Organic Chemistry - Explain why the addition of bromine to trans-cinnamic acid ...
Chemistry - For each definition, find a corresponding term from the following ...
Chemistry - For each definition, find a corresponding term from the following ...
organic chemistry - Write a mechanism to illustrate what will happen if the ...
organic chemistry - Write a mechanism to illustrate what will happen if the ...
organic chemistry please help - Write a mechanism to illustrate what will happen...
Chemistry - This is the first in a series of hw pages. If anyone would be able ...
Organic Chemistry - 1,4-Diphenyl-1,3-butadiene was synthesied using ...

For Further Reading

First Name:
School Subject:
Answer: