1: If you heat your melting point tube too quickly, what will your observed melting point be in comparison to the actual melting point?
2: How fast should you heat a sample?
3: You melt a sample of 3,5-dinitrobenzoic acid (m.p. 205 oC) and you observe a melting point of 185-195 oC. What does this tell you about your sample of 3,5-dinitrobenzoic acid?
4. An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 95 °C, a mixture of X with benzoic acid melts at 115 °C, a mixture of X with phenyl succinate melts at 117 °C, and a mixture of X with m-aminophenol melts at 121 °C. Give the identity of X and explain your reasoning.
Compound m.p., oC
o-toluic acid 102
benzoic acid 121
phenyl succinate 121
m-aminophenol 122
1: If you heat your melting point tube too quickly, what will your observed melting point be in comparison to the actual melting point?
2: How fast should you heat a sample?
3: You melt a sample of 3,5-dinitrobenzoic acid (m.p. 205 oC) and you observe a melting point of 185-195 oC. What does this tell you about your sample of 3,5-dinitrobenzoic acid?
4. An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 95 °C, a mixture of X with benzoic acid melts at 115 °C, a mixture of X with phenyl succinate melts at 117 °C, and a mixture of X with m-aminophenol melts at 121 °C. Give the identity of X and explain your reasoning.
Compound m.p., oC
o-toluic acid 102
benzoic acid 121
phenyl succinate 121
m-aminophenol 122
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