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What technique can be used to separate the following compositions of pair of compouunds? Salicylic acid...

What technique can be used to separate the following compositions of pair of compouunds?

Salicylic acid (mp. 160 degree C ) and acetylsalicylic acid d (mp 141 degee C) 5:95 mixture.

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Answer #1

acetylesalicylic acid produced from salicilic acid. durin this reaction little salicylic acid may present after the reaction. SO we need to purify it form product.

THis can be done by various techniques like coloum chromatography, fractional distilation but the simplest method is recrystalization.

the solubilty of acetylesalicylic acid and salicylic acid are different in ethyle aceatate, acetylesalicylic acid is least soluble in ethyle acetate but  salicylic acid is verymuch soluble. SO take the mixture (5:95) and add little ethylacetate solvent and heat untill it gives clear solution. WHile cooling, the least soluble acetylesalicylic acid will precipitate out from the mixture as pure compound. In the solution mostly salicylic acid will be there.

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