How can you prove that 3 test tubes of equal mp are 3 different compounds?

Three test tubes, A, B, and C, contain substances with approximately the same mp (melting point). How could you prove the 3 test tubes contained 3 different compounds?

How can you prove that 3 test tubes of equal mp are 3 different compounds?
You could use thin layer chromatography. Each chemical would move along the plate at a different pace, therefore each would have a different Rf value.





But there are many ways of determining the differences in compounds, it really depends if they are organic or inorganic chemicals, but you have IR spectroscopy, 1H nmr, atomic absroption spectroscopy and so on.....





It really depends what r
Reply:Colur of the compounds


Check water solubility


Check for solvent solubility


Check with acids for solubility / behavior


Check with alkalies for solubility / behavior


Check for amine test


Check for anilide test


Check for sulphonilamides


Check for amides


From these tests you can prove different / similar compounds
Reply:Is this a qualitiative analysis problem? You could do a battery of tests, including flame tests, solubility rules, distillation to check for bp.... it is a pretty open ended question and I would say you need more information.

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