Rinsing the Solid
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It is important to rinse the precipitate several times to remove impurities. With the vacuum turned off, add several milliliters of solvent to the funnel. Gently slurry the solid and solvent with a stir rod. Be sure not to rip the filter paper.
Turn on the vacuum and draw the solvent through the funnel.
Repeat the rinsing process twice more.
When finished, turn off the vacuum source.