I\'m taking organic chemistry 1: the experiment is Melting point Determination.

Question

I'm taking organic chemistry 1: the experiment is Melting point Determination. For my experiment the Benzoic acid compound one of my melting point experimental is range 116-121 degree Celcius and the literature melting point range is 121-122 degree celcius. The second compound I used is 2-Naphthol the melting point experiment is 114-123 degree Celcius and the melting point Literature is 121-122 degree Celsius. I am writing a lab report and I have no idea how to explain this to summarize the results. IF you took a melting point of a compound you synthesized, what is the true, or literature melting point? How well does your melting point compare? What does your melting point indicate about the purity of your compound? Assume base on the read that is not clear with the experiment,

Explanation / Answer

For Benzoic acid, the range obtained experimentally is 116-121 C and that given in literature is 121-122 C. A lower melting point range is obtained experimentally. When a substance contains an impurity, its melting point decreases. So this shows that the benzoic acid sample has an impurity.

For 2-Naphthol, the range obtained experimentally is 114-123 C and that given in literature is 121-122C. We can see that the experimental range almost matches the range in literature. But the lower range is lower than that given in literature. So we can say that the 2-Naphthol sample has a slight impurity.

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