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    Carb acid + alcohol = Ester e.g. pentanol and athanoic acid

    Observation, give the ester a little sniff

    BUT FIRST!

    Add the mixture to cold water.

    Why must it be added to cold water before smelling?

    THANKS!
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    Just a guess really - the ester isn't soluble in water and so when you add the mixture to water it would float on top of the water - making it easier to smell over the alcohol and carboxylic acid - which do dissolve in water.
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    Thank you.

    Just found out that that is true:

    'Apart from the very small ones, esters are fairly insoluble in water and tend to form a thin layer on the surface. Excess acid and alcohol both dissolve and are tucked safely away under the ester layer.'
 
 
 
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