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Very quick question regarding melting point and purity

  • #1

Homework Statement


For the following melting point, indicate what might be concluded regarding the sample purity:

Melting point: 147ºC (dec.)



Homework Equations


I assume that (dec.) means that the sample decomposed.


The Attempt at a Solution


I am wondering if this means that the sample is practically 100% pure because it decomposed in such a small temperature window, or if the fact that the sample decomposed means that no useful information can be obtained.
 

Answers and Replies

  • #2
chemisttree
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I would say the latter unless you know something more about how a pure sample of the analyte should behave. If it is supposed to melt and it decomposes, you have a reactive impurity. In my experience, reactive impurities mean strong mineral acids or oxidizers.
 

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