If you heat your melting point tube too quickley, what will your observed meltin
ID: 1022403 • Letter: I
Question
If you heat your melting point tube too quickley, what will your observed melting point be in comparison to the actual melting point?
You melt a sample of 3, 5-dinitrobenzoic acid (m.p. 205 degrees C) and you observe a melting point of 185-195 degrees C. What does this tell you about your sample of 3, 5-dinitrobenzoic acid?
An unknown compound X is one of four compounds listed in the table below. A mixture of X with o-toluic acid melts at 95 degrees C, a mixture of X with benzoic acid melts at 115 degrees C, a mixture of X with phenyl succinate melts at 117 degrees C, and a mixture of X with m-aminophenol melts at 121 degrees C. Give the identity of X and explain your reasoning.
Compound m.p., degrees C
o-toulic acid 102
benzoic acid 121
phenyl succinate 121
m-aminophenol 122
Explanation / Answer
Answer:
Hydrogen bond can Influence the melting point rage of the compunds.
3,5- di Nitro benzoic acid containes some Impurities. Which can form the Hydrogen bonds.
X can form the Hydrogen bonds. Hence it lowers the melting point value.
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