You and your lab partner are working together to identify your carboxylic acids
ID: 851356 • Letter: Y
Question
You and your lab partner are working together to identify your carboxylic acids from the extraction lab. Your partner has identified their unknown as cinnamic acid which melts at 133-134 degree C. You have identified your unknown as acetylsalicylic acid which melts at 132-135 degree C. Both products are a while powder. While you have your back turned, your partner puts their unlabeled bottle of cinnamic acid right next to your unlabeled bottle of acetylsalicylic acid. Oh bother! You must turn in the correct product to get points Explain how would you determine which bottle contains which carboxylic acid. Assume that you have access to pure bottles of cinnamic acid and acetylsalicylic acid.Explanation / Answer
Bromine Test : Bromine solution turns colourless when reacts with alkene, as Bromine readily adds across the carbon-carbon double bond of an alkene to produce a dibromoalkane.
Thus cinnamic acid will show the test and acetyl salicylic would not.
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