orgo lab question

[Premedalltheway]

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why is it necessary to dry the recrystallized compound before taking a melting poiint?

 

[Fermata]

why is it necessary to dry the recrystallized compound before taking a melting poiint?

So you can see it MELT. 😀

 

[Fermata]

Just kidding.

You let it dry because the water/solvent can greatly affect the MP of the compound.

You want as pure a sample as possible.

 

[Fermata]

As a side note.......one time we had to rush a recrystallization where we didn't have time to let the recystallized compound dry....

We got a yield of about 200% and a ridiculously wrong MP measurement.

LOL.